From 56079431b6ba163df8ba26b3eccc82379f0c0ce4 Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Wed, 29 Mar 2006 15:57:29 -0800 Subject: [NET]: Deinline some larger functions from netdevice.h On a allyesconfig'ured kernel: Size Uses Wasted Name and definition ===== ==== ====== ================================================ 95 162 12075 netif_wake_queue include/linux/netdevice.h 129 86 9265 dev_kfree_skb_any include/linux/netdevice.h 127 56 5885 netif_device_attach include/linux/netdevice.h 73 86 4505 dev_kfree_skb_irq include/linux/netdevice.h 46 60 1534 netif_device_detach include/linux/netdevice.h 119 16 1485 __netif_rx_schedule include/linux/netdevice.h 143 5 492 netif_rx_schedule include/linux/netdevice.h 81 7 366 netif_schedule include/linux/netdevice.h netif_wake_queue is big because __netif_schedule is a big inline: static inline void __netif_schedule(struct net_device *dev) { if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) { unsigned long flags; struct softnet_data *sd; local_irq_save(flags); sd = &__get_cpu_var(softnet_data); dev->next_sched = sd->output_queue; sd->output_queue = dev; raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_restore(flags); } } static inline void netif_wake_queue(struct net_device *dev) { #ifdef CONFIG_NETPOLL_TRAP if (netpoll_trap()) return; #endif if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) __netif_schedule(dev); } By de-inlining __netif_schedule we are saving a lot of text at each callsite of netif_wake_queue and netif_schedule. __netif_rx_schedule is also big, and it makes more sense to keep both of them out of line. Patch also deinlines dev_kfree_skb_any. We can deinline dev_kfree_skb_irq instead... oh well. netif_device_attach/detach are not hot paths, we can deinline them too. Signed-off-by: Denis Vlasenko Signed-off-by: Andrew Morton Signed-off-by: David S. Miller --- include/linux/netdevice.h | 55 +++++------------------------------------------ 1 file changed, 5 insertions(+), 50 deletions(-) (limited to 'include') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 950dc55e5192..40ccf8cc4239 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -598,20 +598,7 @@ DECLARE_PER_CPU(struct softnet_data,softnet_data); #define HAVE_NETIF_QUEUE -static inline void __netif_schedule(struct net_device *dev) -{ - if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) { - unsigned long flags; - struct softnet_data *sd; - - local_irq_save(flags); - sd = &__get_cpu_var(softnet_data); - dev->next_sched = sd->output_queue; - sd->output_queue = dev; - raise_softirq_irqoff(NET_TX_SOFTIRQ); - local_irq_restore(flags); - } -} +extern void __netif_schedule(struct net_device *dev); static inline void netif_schedule(struct net_device *dev) { @@ -675,13 +662,7 @@ static inline void dev_kfree_skb_irq(struct sk_buff *skb) /* Use this variant in places where it could be invoked * either from interrupt or non-interrupt context. */ -static inline void dev_kfree_skb_any(struct sk_buff *skb) -{ - if (in_irq() || irqs_disabled()) - dev_kfree_skb_irq(skb); - else - dev_kfree_skb(skb); -} +extern void dev_kfree_skb_any(struct sk_buff *skb); #define HAVE_NETIF_RX 1 extern int netif_rx(struct sk_buff *skb); @@ -768,22 +749,9 @@ static inline int netif_device_present(struct net_device *dev) return test_bit(__LINK_STATE_PRESENT, &dev->state); } -static inline void netif_device_detach(struct net_device *dev) -{ - if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) && - netif_running(dev)) { - netif_stop_queue(dev); - } -} +extern void netif_device_detach(struct net_device *dev); -static inline void netif_device_attach(struct net_device *dev) -{ - if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) && - netif_running(dev)) { - netif_wake_queue(dev); - __netdev_watchdog_up(dev); - } -} +extern void netif_device_attach(struct net_device *dev); /* * Network interface message level settings @@ -851,20 +819,7 @@ static inline int netif_rx_schedule_prep(struct net_device *dev) * already been called and returned 1. */ -static inline void __netif_rx_schedule(struct net_device *dev) -{ - unsigned long flags; - - local_irq_save(flags); - dev_hold(dev); - list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); - if (dev->quota < 0) - dev->quota += dev->weight; - else - dev->quota = dev->weight; - __raise_softirq_irqoff(NET_RX_SOFTIRQ); - local_irq_restore(flags); -} +extern void __netif_rx_schedule(struct net_device *dev); /* Try to reschedule poll. Called by irq handler. */ -- cgit v1.2.3 From d53ace70052b5c0a08a4f92993c0614f84920abf Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 29 Mar 2006 09:42:43 +0100 Subject: [ARM] Allow un-muxed syscalls to be available for everyone It's been a while since the un-muxed socket and ipc syscalls were introduced, so make the unistd.h number definitions visible for non-EABI as well as EABI. Signed-off-by: Russell King --- include/asm-arm/unistd.h | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'include') diff --git a/include/asm-arm/unistd.h b/include/asm-arm/unistd.h index 8f331bbd39a8..65ac305c2d45 100644 --- a/include/asm-arm/unistd.h +++ b/include/asm-arm/unistd.h @@ -308,8 +308,6 @@ #define __NR_mq_notify (__NR_SYSCALL_BASE+278) #define __NR_mq_getsetattr (__NR_SYSCALL_BASE+279) #define __NR_waitid (__NR_SYSCALL_BASE+280) - -#if defined(__ARM_EABI__) /* reserve these for un-muxing socketcall */ #define __NR_socket (__NR_SYSCALL_BASE+281) #define __NR_bind (__NR_SYSCALL_BASE+282) #define __NR_connect (__NR_SYSCALL_BASE+283) @@ -327,9 +325,6 @@ #define __NR_getsockopt (__NR_SYSCALL_BASE+295) #define __NR_sendmsg (__NR_SYSCALL_BASE+296) #define __NR_recvmsg (__NR_SYSCALL_BASE+297) -#endif - -#if defined(__ARM_EABI__) /* reserve these for un-muxing ipc */ #define __NR_semop (__NR_SYSCALL_BASE+298) #define __NR_semget (__NR_SYSCALL_BASE+299) #define __NR_semctl (__NR_SYSCALL_BASE+300) @@ -341,16 +336,10 @@ #define __NR_shmdt (__NR_SYSCALL_BASE+306) #define __NR_shmget (__NR_SYSCALL_BASE+307) #define __NR_shmctl (__NR_SYSCALL_BASE+308) -#endif - #define __NR_add_key (__NR_SYSCALL_BASE+309) #define __NR_request_key (__NR_SYSCALL_BASE+310) #define __NR_keyctl (__NR_SYSCALL_BASE+311) - -#if defined(__ARM_EABI__) /* reserved for un-muxing ipc */ #define __NR_semtimedop (__NR_SYSCALL_BASE+312) -#endif - #define __NR_vserver (__NR_SYSCALL_BASE+313) #define __NR_ioprio_set (__NR_SYSCALL_BASE+314) #define __NR_ioprio_get (__NR_SYSCALL_BASE+315) -- cgit v1.2.3 From fd88dd740ad7b92cd399b6116dfa9486b36ffaff Mon Sep 17 00:00:00 2001 From: Marc-Andre Hebert Date: Thu, 30 Mar 2006 10:24:08 +0100 Subject: [ARM] 3434/1: pxa i2s amsl define Patch from Marc-Andre Hebert The error concerns a bit mask define for the AMSL bit of the SACR1 register in the 2.6 kernel tree. The AMSL is bit 0 and it was defined as so in the 2.4 kernel tree but it is inccorrectly set as bit 1 (a reserved bit) in the 2.6 kernel tree. Signed-off-by: Marc-Andre Hebert Signed-off-by: Russell King --- include/asm-arm/arch-pxa/pxa-regs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-arm/arch-pxa/pxa-regs.h b/include/asm-arm/arch-pxa/pxa-regs.h index 1409c5bd703f..c8f53a71c076 100644 --- a/include/asm-arm/arch-pxa/pxa-regs.h +++ b/include/asm-arm/arch-pxa/pxa-regs.h @@ -485,7 +485,7 @@ #define SACR1_ENLBF (1 << 5) /* Enable Loopback */ #define SACR1_DRPL (1 << 4) /* Disable Replaying Function */ #define SACR1_DREC (1 << 3) /* Disable Recording Function */ -#define SACR1_AMSL (1 << 1) /* Specify Alternate Mode */ +#define SACR1_AMSL (1 << 0) /* Specify Alternate Mode */ #define SASR0_I2SOFF (1 << 7) /* Controller Status */ #define SASR0_ROR (1 << 6) /* Rx FIFO Overrun */ -- cgit v1.2.3 From cc3d48db75235adf0ae37d3287f6f9e14657d1ae Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Thu, 30 Mar 2006 10:51:44 +0100 Subject: [ARM] 3424/2: ixp23xx: fix uncompress.h for recent CRLF decompressor change Patch from Lennert Buytenhek Adapt ixp23xx uncompress.h to a081568d7016061ed848696984e3acf1ba0b3054. Signed-off-by: Lennert Buytenhek Signed-off-by: Russell King --- include/asm-arm/arch-ixp23xx/uncompress.h | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'include') diff --git a/include/asm-arm/arch-ixp23xx/uncompress.h b/include/asm-arm/arch-ixp23xx/uncompress.h index 62623fa9b2f7..013575e6a9a1 100644 --- a/include/asm-arm/arch-ixp23xx/uncompress.h +++ b/include/asm-arm/arch-ixp23xx/uncompress.h @@ -16,26 +16,21 @@ #define UART_BASE ((volatile u32 *)IXP23XX_UART1_PHYS) -static __inline__ void putc(char c) +static inline void putc(char c) { int j; for (j = 0; j < 0x1000; j++) { if (UART_BASE[UART_LSR] & UART_LSR_THRE) break; + barrier(); } UART_BASE[UART_TX] = c; } -static void putstr(const char *s) +static inline void flush(void) { - while (*s) { - putc(*s); - if (*s == '\n') - putc('\r'); - s++; - } } #define arch_decomp_setup() -- cgit v1.2.3 From 618a3c03fcfdf1ac4543247c8ddfb0c9d775ff33 Mon Sep 17 00:00:00 2001 From: Hal Rosenstock Date: Tue, 28 Mar 2006 16:40:04 -0800 Subject: IB/mad: RMPP support for additional classes Add RMPP support for additional management classes that support it. Also, validate RMPP is consistent with management class specified. Signed-off-by: Hal Rosenstock Signed-off-by: Sean Hefty Signed-off-by: Roland Dreier --- include/rdma/ib_mad.h | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h index 51ab8eddb295..5ff77558013b 100644 --- a/include/rdma/ib_mad.h +++ b/include/rdma/ib_mad.h @@ -3,7 +3,7 @@ * Copyright (c) 2004 Infinicon Corporation. All rights reserved. * Copyright (c) 2004 Intel Corporation. All rights reserved. * Copyright (c) 2004 Topspin Corporation. All rights reserved. - * Copyright (c) 2004 Voltaire Corporation. All rights reserved. + * Copyright (c) 2004-2006 Voltaire Corporation. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU @@ -55,6 +55,10 @@ #define IB_MGMT_CLASS_DEVICE_MGMT 0x06 #define IB_MGMT_CLASS_CM 0x07 #define IB_MGMT_CLASS_SNMP 0x08 +#define IB_MGMT_CLASS_DEVICE_ADM 0x10 +#define IB_MGMT_CLASS_BOOT_MGMT 0x11 +#define IB_MGMT_CLASS_BIS 0x12 +#define IB_MGMT_CLASS_CONG_MGMT 0x21 #define IB_MGMT_CLASS_VENDOR_RANGE2_START 0x30 #define IB_MGMT_CLASS_VENDOR_RANGE2_END 0x4F @@ -117,6 +121,8 @@ enum { IB_MGMT_VENDOR_DATA = 216, IB_MGMT_SA_HDR = 56, IB_MGMT_SA_DATA = 200, + IB_MGMT_DEVICE_HDR = 64, + IB_MGMT_DEVICE_DATA = 192, }; struct ib_mad_hdr { @@ -602,6 +608,25 @@ struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, int hdr_len, int data_len, gfp_t gfp_mask); +/** + * ib_is_mad_class_rmpp - returns whether given management class + * supports RMPP. + * @mgmt_class: management class + * + * This routine returns whether the management class supports RMPP. + */ +int ib_is_mad_class_rmpp(u8 mgmt_class); + +/** + * ib_get_mad_data_offset - returns the data offset for a given + * management class. + * @mgmt_class: management class + * + * This routine returns the data offset in the MAD for the management + * class requested. + */ +int ib_get_mad_data_offset(u8 mgmt_class); + /** * ib_get_rmpp_segment - returns the data buffer for a given RMPP segment. * @send_buf: Previously allocated send data buffer. -- cgit v1.2.3 From 3283a67d8618c9a292eced23e8753ab64adc6dba Mon Sep 17 00:00:00 2001 From: Jes Sorensen Date: Thu, 30 Mar 2006 10:13:22 -0500 Subject: [IA64] Add __mca_table to the DISCARD list in gate.lds Add __mca_table to the DISCARD list for the gate.lds linker script to avoid broken linker references when linking the final vmlinux file. Also add comment to include/asm-ia64/asmmacros.h to avoid anyone else hitting this problem in the future. Credits to James Bottomley for spotting the DISCARD list in gate.lds.S Signed-off-by: Jes Sorensen Signed-off-by: Tony Luck --- include/asm-ia64/asmmacro.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include') diff --git a/include/asm-ia64/asmmacro.h b/include/asm-ia64/asmmacro.h index d4cec32083d8..edf2cebb2969 100644 --- a/include/asm-ia64/asmmacro.h +++ b/include/asm-ia64/asmmacro.h @@ -38,6 +38,10 @@ name: /* * Helper macros for accessing user memory. + * + * When adding any new .section/.previous entries here, make sure to + * also add it to the DISCARD section in arch/ia64/kernel/gate.lds.S or + * unpleasant things will happen. */ .section "__ex_table", "a" // declare section & section attributes -- cgit v1.2.3 From a81dd18eb974cc34634c53a6447b2799ec0c3158 Mon Sep 17 00:00:00 2001 From: Thibaut VARENE Date: Fri, 3 Feb 2006 18:06:30 -0700 Subject: [PARISC] Clarify pdc_stable license terms pdc_stable.c is explicitly licensed under GPL version 2. Signed-off-by: Thibaut VARENE Signed-off-by: Kyle McMartin --- include/asm-parisc/pdc_chassis.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/pdc_chassis.h b/include/asm-parisc/pdc_chassis.h index adac9ac2743f..a609273dc6bf 100644 --- a/include/asm-parisc/pdc_chassis.h +++ b/include/asm-parisc/pdc_chassis.h @@ -6,9 +6,8 @@ * * * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of -- cgit v1.2.3 From ab43227c8a568119a3aebc952a95ac3023e1730d Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Wed, 22 Mar 2006 08:28:59 -0700 Subject: [PARISC] Add parisc implementation of flush_anon_page() This should now allow SG_IO and fuse to function correctly on our platform. Signed-off-by: James Bottomley Signed-off-by: Kyle McMartin --- include/asm-parisc/cacheflush.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include') diff --git a/include/asm-parisc/cacheflush.h b/include/asm-parisc/cacheflush.h index c53af9ff41b5..482be77551e3 100644 --- a/include/asm-parisc/cacheflush.h +++ b/include/asm-parisc/cacheflush.h @@ -184,6 +184,14 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long } +static inline void +flush_anon_page(struct page *page, unsigned long vmaddr) +{ + if (PageAnon(page)) + flush_user_dcache_page(vmaddr); +} +#define ARCH_HAS_FLUSH_ANON_PAGE + #ifdef CONFIG_DEBUG_RODATA void mark_rodata_ro(void); #endif -- cgit v1.2.3 From ba57583396585a1ca509e2a84d970a2ff3f9bbfb Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Wed, 22 Mar 2006 09:42:04 -0700 Subject: [PARISC] Add parisc implementation of flush_kernel_dcache_page() We need to do a little renaming of our original syntax because of the difference in arguments. Signed-off-by: James Bottomley Signed-off-by: Kyle McMartin --- include/asm-parisc/cache.h | 2 +- include/asm-parisc/cacheflush.h | 9 ++++++++- include/asm-parisc/page.h | 2 +- 3 files changed, 10 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/cache.h b/include/asm-parisc/cache.h index ae50f8e12eed..c831665473cb 100644 --- a/include/asm-parisc/cache.h +++ b/include/asm-parisc/cache.h @@ -48,7 +48,7 @@ extern void flush_user_icache_range_asm(unsigned long, unsigned long); extern void flush_kernel_icache_range_asm(unsigned long, unsigned long); extern void flush_user_dcache_range_asm(unsigned long, unsigned long); extern void flush_kernel_dcache_range_asm(unsigned long, unsigned long); -extern void flush_kernel_dcache_page(void *); +extern void flush_kernel_dcache_page_asm(void *); extern void flush_kernel_icache_page(void *); extern void disable_sr_hashing(void); /* turns off space register hashing */ extern void disable_sr_hashing_asm(int); /* low level support for above */ diff --git a/include/asm-parisc/cacheflush.h b/include/asm-parisc/cacheflush.h index 482be77551e3..76b6b7d6046a 100644 --- a/include/asm-parisc/cacheflush.h +++ b/include/asm-parisc/cacheflush.h @@ -62,7 +62,7 @@ extern void flush_dcache_page(struct page *page); #define flush_dcache_mmap_unlock(mapping) \ write_unlock_irq(&(mapping)->tree_lock) -#define flush_icache_page(vma,page) do { flush_kernel_dcache_page(page_address(page)); flush_kernel_icache_page(page_address(page)); } while (0) +#define flush_icache_page(vma,page) do { flush_kernel_dcache_page(page); flush_kernel_icache_page(page_address(page)); } while (0) #define flush_icache_range(s,e) do { flush_kernel_dcache_range_asm(s,e); flush_kernel_icache_range_asm(s,e); } while (0) @@ -192,6 +192,13 @@ flush_anon_page(struct page *page, unsigned long vmaddr) } #define ARCH_HAS_FLUSH_ANON_PAGE +static inline void +flush_kernel_dcache_page(struct page *page) +{ + flush_kernel_dcache_page_asm(page_address(page)); +} +#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE + #ifdef CONFIG_DEBUG_RODATA void mark_rodata_ro(void); #endif diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h index 9f303c0c3cd7..c6c9d5793070 100644 --- a/include/asm-parisc/page.h +++ b/include/asm-parisc/page.h @@ -26,7 +26,7 @@ static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg) { copy_user_page_asm(vto, vfrom); - flush_kernel_dcache_page(vto); + flush_kernel_dcache_page_asm(vto); /* XXX: ppc flushes icache too, should we? */ } -- cgit v1.2.3 From b31059f7634931a06f6811247ae9217d1a833a46 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Thu, 23 Mar 2006 15:48:15 -0700 Subject: [PARISC] Add STRICT_MM_TYPECHECKS Add STRICT_MM_TYPECHECKS to page.h as other architectures do. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin --- include/asm-parisc/page.h | 56 +++++++++++++++++++++++++++++++++-------------- 1 file changed, 40 insertions(+), 16 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h index c6c9d5793070..45e02aa5bf4b 100644 --- a/include/asm-parisc/page.h +++ b/include/asm-parisc/page.h @@ -40,14 +40,19 @@ clear_user_page(void *page, unsigned long vaddr, struct page *pg) /* * These are used to make use of C type-checking.. */ -#ifdef __LP64__ -typedef struct { unsigned long pte; } pte_t; -#else -typedef struct { - unsigned long pte; - unsigned long flags; -} pte_t; +#define STRICT_MM_TYPECHECKS +#ifdef STRICT_MM_TYPECHECKS +typedef struct { unsigned long pte; +#if !defined(CONFIG_64BIT) + unsigned long future_flags; + /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY + to 2, but then strangely the identical 32bit kernel boots on a + c3000(pa20), but not any longer on a 715(pa11). + Still investigating... HelgeD. + */ #endif +} pte_t; /* either 32 or 64bit */ + /* NOTE: even on 64 bits, these entries are __u32 because we allocate * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ typedef struct { __u32 pmd; } pmd_t; @@ -55,25 +60,44 @@ typedef struct { __u32 pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) -#ifdef __LP64__ -#define pte_flags(x) (*(__u32 *)&((x).pte)) -#else -#define pte_flags(x) ((x).flags) -#endif - /* These do not work lvalues, so make sure we don't use them as such. */ #define pmd_val(x) ((x).pmd + 0) #define pgd_val(x) ((x).pgd + 0) #define pgprot_val(x) ((x).pgprot) -#define __pmd_val_set(x,n) (x).pmd = (n) -#define __pgd_val_set(x,n) (x).pgd = (n) - #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) +#define __pmd_val_set(x,n) (x).pmd = (n) +#define __pgd_val_set(x,n) (x).pgd = (n) + +#else +/* + * .. while these make it easier on the compiler + */ +typedef unsigned long pte_t; +typedef __u32 pmd_t; +typedef __u32 pgd_t; +typedef unsigned long pgprot_t; + +#define pte_val(x) (x) +#define pmd_val(x) (x) +#define pgd_val(x) (x) +#define pgprot_val(x) (x) + +#define __pte(x) (x) +#define __pmd(x) (x) +#define __pgd(x) (x) +#define __pgprot(x) (x) + +#define __pmd_val_set(x,n) (x) = (n) +#define __pgd_val_set(x,n) (x) = (n) + +#endif /* STRICT_MM_TYPECHECKS */ + + typedef struct __physmem_range { unsigned long start_pfn; unsigned long pages; /* PAGE_SIZE pages */ -- cgit v1.2.3 From b8ce0aadcdebbaf5ec013c57e2a0803060817bcc Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Tue, 7 Mar 2006 14:12:13 -0700 Subject: [PARISC] Add CONFIG_HPPA_IOREMAP to conditionally enable ioremap Instead of making it a #define in asm/io.h, allow user to select to turn on IOREMAP from the config menu. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin --- include/asm-parisc/io.h | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/io.h b/include/asm-parisc/io.h index be0c7234a6da..2fb253255102 100644 --- a/include/asm-parisc/io.h +++ b/include/asm-parisc/io.h @@ -26,11 +26,7 @@ extern unsigned long parisc_vmerge_max_size; */ #ifdef CONFIG_DEBUG_IOREMAP -#ifdef CONFIG_64BIT -#define NYBBLE_SHIFT 60 -#else -#define NYBBLE_SHIFT 28 -#endif +#define NYBBLE_SHIFT (BITS_PER_LONG - 4) extern void gsc_bad_addr(unsigned long addr); extern void __raw_bad_addr(const volatile void __iomem *addr); #define gsc_check_addr(addr) \ @@ -181,13 +177,11 @@ extern inline void * ioremap_nocache(unsigned long offset, unsigned long size) extern void iounmap(void __iomem *addr); /* - * USE_HPPA_IOREMAP is the magic flag to enable or disable real ioremap() + * CONFIG_HPPA_IOREMAP is the magic flag to enable or disable real ioremap() * functionality. It's currently disabled because it may not work on some * machines. */ -#define USE_HPPA_IOREMAP 0 - -#if USE_HPPA_IOREMAP +#ifdef CONFIG_HPPA_IOREMAP static inline unsigned char __raw_readb(const volatile void __iomem *addr) { return (*(volatile unsigned char __force *) (addr)); @@ -221,7 +215,7 @@ static inline void __raw_writeq(unsigned long long b, volatile void __iomem *add { *(volatile unsigned long long __force *) addr = b; } -#else /* !USE_HPPA_IOREMAP */ +#else /* !CONFIG_HPPA_IOREMAP */ static inline unsigned char __raw_readb(const volatile void __iomem *addr) { __raw_check_addr(addr); @@ -271,7 +265,7 @@ static inline void __raw_writeq(unsigned long long b, volatile void __iomem *add gsc_writeq(b, (unsigned long) addr); } -#endif /* !USE_HPPA_IOREMAP */ +#endif /* !CONFIG_HPPA_IOREMAP */ /* readb can never be const, so use __fswab instead of le*_to_cpu */ #define readb(addr) __raw_readb(addr) -- cgit v1.2.3 From 29ef8295327653ff09a56285c35213cd31fa54b3 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Thu, 23 Mar 2006 00:32:46 -0700 Subject: [PARISC] Enable ioremap functionality unconditionally Enable CONFIG_HPPA_IOREMAP by default and remove all now unnecessary code. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin --- include/asm-parisc/io.h | 58 +------------------------------------------------ 1 file changed, 1 insertion(+), 57 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/io.h b/include/asm-parisc/io.h index 2fb253255102..bcfe0b09c93f 100644 --- a/include/asm-parisc/io.h +++ b/include/asm-parisc/io.h @@ -176,12 +176,7 @@ extern inline void * ioremap_nocache(unsigned long offset, unsigned long size) extern void iounmap(void __iomem *addr); -/* - * CONFIG_HPPA_IOREMAP is the magic flag to enable or disable real ioremap() - * functionality. It's currently disabled because it may not work on some - * machines. - */ -#ifdef CONFIG_HPPA_IOREMAP + static inline unsigned char __raw_readb(const volatile void __iomem *addr) { return (*(volatile unsigned char __force *) (addr)); @@ -215,57 +210,6 @@ static inline void __raw_writeq(unsigned long long b, volatile void __iomem *add { *(volatile unsigned long long __force *) addr = b; } -#else /* !CONFIG_HPPA_IOREMAP */ -static inline unsigned char __raw_readb(const volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - return gsc_readb((unsigned long) addr); -} -static inline unsigned short __raw_readw(const volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - return gsc_readw((unsigned long) addr); -} -static inline unsigned int __raw_readl(const volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - return gsc_readl((unsigned long) addr); -} -static inline unsigned long long __raw_readq(const volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - return gsc_readq((unsigned long) addr); -} - -static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - gsc_writeb(b, (unsigned long) addr); -} -static inline void __raw_writew(unsigned short b, volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - gsc_writew(b, (unsigned long) addr); -} -static inline void __raw_writel(unsigned int b, volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - gsc_writel(b, (unsigned long) addr); -} -static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr) -{ - __raw_check_addr(addr); - - gsc_writeq(b, (unsigned long) addr); -} -#endif /* !CONFIG_HPPA_IOREMAP */ /* readb can never be const, so use __fswab instead of le*_to_cpu */ #define readb(addr) __raw_readb(addr) -- cgit v1.2.3 From a41d3862dfd44a1b09a0f6243bb34773061fd9a2 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Thu, 23 Mar 2006 01:07:00 -0700 Subject: [PARISC] Remove obsolete CONFIG_DEBUG_IOREMAP Remove CONFIG_DEBUG_IOREMAP, it's now obsolete and won't work anyway. Remove it from lib/KConfig since it was only available on parisc. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin --- include/asm-parisc/io.h | 33 --------------------------------- 1 file changed, 33 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/io.h b/include/asm-parisc/io.h index bcfe0b09c93f..29da31194b91 100644 --- a/include/asm-parisc/io.h +++ b/include/asm-parisc/io.h @@ -25,31 +25,11 @@ extern unsigned long parisc_vmerge_max_size; * eg dev->hpa or 0xfee00000. */ -#ifdef CONFIG_DEBUG_IOREMAP -#define NYBBLE_SHIFT (BITS_PER_LONG - 4) -extern void gsc_bad_addr(unsigned long addr); -extern void __raw_bad_addr(const volatile void __iomem *addr); -#define gsc_check_addr(addr) \ - if ((addr >> NYBBLE_SHIFT) != 0xf) { \ - gsc_bad_addr(addr); \ - addr |= 0xfUL << NYBBLE_SHIFT; \ - } -#define __raw_check_addr(addr) \ - if (((unsigned long)addr >> NYBBLE_SHIFT) != 0xe) \ - __raw_bad_addr(addr); \ - addr = (void __iomem *)((unsigned long)addr | (0xfUL << NYBBLE_SHIFT)); -#else -#define gsc_check_addr(addr) -#define __raw_check_addr(addr) -#endif - static inline unsigned char gsc_readb(unsigned long addr) { long flags; unsigned char ret; - gsc_check_addr(addr); - __asm__ __volatile__( " rsm 2,%0\n" " ldbx 0(%2),%1\n" @@ -64,8 +44,6 @@ static inline unsigned short gsc_readw(unsigned long addr) long flags; unsigned short ret; - gsc_check_addr(addr); - __asm__ __volatile__( " rsm 2,%0\n" " ldhx 0(%2),%1\n" @@ -79,8 +57,6 @@ static inline unsigned int gsc_readl(unsigned long addr) { u32 ret; - gsc_check_addr(addr); - __asm__ __volatile__( " ldwax 0(%1),%0\n" : "=r" (ret) : "r" (addr) ); @@ -91,7 +67,6 @@ static inline unsigned int gsc_readl(unsigned long addr) static inline unsigned long long gsc_readq(unsigned long addr) { unsigned long long ret; - gsc_check_addr(addr); #ifdef __LP64__ __asm__ __volatile__( @@ -108,8 +83,6 @@ static inline unsigned long long gsc_readq(unsigned long addr) static inline void gsc_writeb(unsigned char val, unsigned long addr) { long flags; - gsc_check_addr(addr); - __asm__ __volatile__( " rsm 2,%0\n" " stbs %1,0(%2)\n" @@ -120,8 +93,6 @@ static inline void gsc_writeb(unsigned char val, unsigned long addr) static inline void gsc_writew(unsigned short val, unsigned long addr) { long flags; - gsc_check_addr(addr); - __asm__ __volatile__( " rsm 2,%0\n" " sths %1,0(%2)\n" @@ -131,8 +102,6 @@ static inline void gsc_writew(unsigned short val, unsigned long addr) static inline void gsc_writel(unsigned int val, unsigned long addr) { - gsc_check_addr(addr); - __asm__ __volatile__( " stwas %0,0(%1)\n" : : "r" (val), "r" (addr) ); @@ -140,8 +109,6 @@ static inline void gsc_writel(unsigned int val, unsigned long addr) static inline void gsc_writeq(unsigned long long val, unsigned long addr) { - gsc_check_addr(addr); - #ifdef __LP64__ __asm__ __volatile__( " stda %0,0(%1)\n" -- cgit v1.2.3 From 10267cdd0c2dee46a3f59d93fbfac7229d416dba Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Sun, 26 Mar 2006 01:54:16 -0700 Subject: [PARISC] Fixup CONFIG_EISA a bit Fix up some ISA/EISA stuff. (Note: isa_ accessors have been removed from asm/io.h) Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin --- include/asm-parisc/pci.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include') diff --git a/include/asm-parisc/pci.h b/include/asm-parisc/pci.h index fe7f6a2f5aa7..77bbafb7f73e 100644 --- a/include/asm-parisc/pci.h +++ b/include/asm-parisc/pci.h @@ -289,4 +289,9 @@ static inline void pcibios_add_platform_entries(struct pci_dev *dev) { } +static inline void pcibios_penalize_isa_irq(int irq, int active) +{ + /* We don't need to penalize isa irq's */ +} + #endif /* __ASM_PARISC_PCI_H */ -- cgit v1.2.3 From bc8846c522264d2522b0082321ec8c2051a4536f Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Fri, 24 Mar 2006 21:22:02 -0700 Subject: [PARISC] More useful readwrite lock helpers spinlock.c needs _can_lock helpers. Rewrite _is_locked helpers to be _can_lock helpers. Signed-off-by: Kyle McMartin --- include/asm-parisc/spinlock.h | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/spinlock.h b/include/asm-parisc/spinlock.h index 16c2ac075fc5..a93960e232cf 100644 --- a/include/asm-parisc/spinlock.h +++ b/include/asm-parisc/spinlock.h @@ -134,14 +134,22 @@ static __inline__ int __raw_write_trylock(raw_rwlock_t *rw) return 1; } -static __inline__ int __raw_is_read_locked(raw_rwlock_t *rw) +/* + * read_can_lock - would read_trylock() succeed? + * @lock: the rwlock in question. + */ +static __inline__ int __raw_read_can_lock(raw_rwlock_t *rw) { - return rw->counter > 0; + return rw->counter >= 0; } -static __inline__ int __raw_is_write_locked(raw_rwlock_t *rw) +/* + * write_can_lock - would write_trylock() succeed? + * @lock: the rwlock in question. + */ +static __inline__ int __raw_write_can_lock(raw_rwlock_t *rw) { - return rw->counter < 0; + return !rw->counter; } #endif /* __ASM_SPINLOCK_H */ -- cgit v1.2.3 From 50a34dbd612925f2ec55b1781632835ef36b97d5 Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Fri, 24 Mar 2006 21:24:21 -0700 Subject: [PARISC] Add PREEMPT support Signed-off-by: Kyle McMartin --- include/asm-parisc/thread_info.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-parisc/thread_info.h b/include/asm-parisc/thread_info.h index ac32f140b83a..f2f83b04cd8b 100644 --- a/include/asm-parisc/thread_info.h +++ b/include/asm-parisc/thread_info.h @@ -49,7 +49,8 @@ struct thread_info { #endif /* !__ASSEMBLY */ -#define PREEMPT_ACTIVE 0x10000000 +#define PREEMPT_ACTIVE_BIT 28 +#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT) /* * thread information flags -- cgit v1.2.3 From 2746ae14fe55f9483ae94ef89d4495d0eb8ee03d Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Wed, 29 Mar 2006 07:04:49 -0700 Subject: [PARISC] Make local_t use atomic_long_t As done in asm-generic/local.h in mainline. Otherwise local_t was 32-bit even on a 64-bit kernel. Signed-off-by: Kyle McMartin --- include/asm-parisc/local.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'include') diff --git a/include/asm-parisc/local.h b/include/asm-parisc/local.h index 892b3b2c4962..d0f550912755 100644 --- a/include/asm-parisc/local.h +++ b/include/asm-parisc/local.h @@ -4,16 +4,16 @@ #include #include -typedef atomic_t local_t; +typedef atomic_long_t local_t; -#define LOCAL_INIT(i) ATOMIC_INIT(i) -#define local_read(v) atomic_read(v) -#define local_set(v,i) atomic_set(v,i) +#define LOCAL_INIT(i) ATOMIC_LONG_INIT(i) +#define local_read(v) atomic_long_read(v) +#define local_set(v,i) atomic_long_set(v,i) -#define local_inc(v) atomic_inc(v) -#define local_dec(v) atomic_dec(v) -#define local_add(i, v) atomic_add(i, v) -#define local_sub(i, v) atomic_sub(i, v) +#define local_inc(v) atomic_long_inc(v) +#define local_dec(v) atomic_long_dec(v) +#define local_add(i, v) atomic_long_add(i, v) +#define local_sub(i, v) atomic_long_sub(i, v) #define __local_inc(v) ((v)->counter++) #define __local_dec(v) ((v)->counter--) -- cgit v1.2.3 From 4da9f131a74d12de56c44da6d522a9116da06805 Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Wed, 29 Mar 2006 19:47:32 -0500 Subject: [PARISC] Add atomic_sub_and_test Define atomic_sub_and_test to fix build failures. Signed-off-by: Kyle McMartin --- include/asm-parisc/atomic.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/asm-parisc/atomic.h b/include/asm-parisc/atomic.h index 4dc7253ff5d0..403ea97316cf 100644 --- a/include/asm-parisc/atomic.h +++ b/include/asm-parisc/atomic.h @@ -210,6 +210,8 @@ static __inline__ int atomic_read(const atomic_t *v) #define atomic_dec_and_test(v) (atomic_dec_return(v) == 0) +#define atomic_sub_and_test(i,v) (atomic_sub_return((i),(v)) == 0) + #define ATOMIC_INIT(i) ((atomic_t) { (i) }) #define smp_mb__before_atomic_dec() smp_mb() @@ -267,6 +269,7 @@ atomic64_read(const atomic64_t *v) #define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0) #define atomic64_dec_and_test(v) (atomic64_dec_return(v) == 0) +#define atomic64_sub_and_test(i,v) (atomic64_sub_return((i),(v)) == 0) #endif /* __LP64__ */ -- cgit v1.2.3 From 5274f052e7b3dbd81935772eb551dfd0325dfa9d Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 30 Mar 2006 15:15:30 +0200 Subject: [PATCH] Introduce sys_splice() system call This adds support for the sys_splice system call. Using a pipe as a transport, it can connect to files or sockets (latter as output only). From the splice.c comments: "splice": joining two ropes together by interweaving their strands. This is the "extended pipe" functionality, where a pipe is used as an arbitrary in-memory buffer. Think of a pipe as a small kernel buffer that you can use to transfer data from one end to the other. The traditional unix read/write is extended with a "splice()" operation that transfers data buffers to or from a pipe buffer. Named by Larry McVoy, original implementation from Linus, extended by Jens to support splicing to files and fixing the initial implementation bugs. Signed-off-by: Jens Axboe Signed-off-by: Linus Torvalds --- include/asm-i386/unistd.h | 3 ++- include/asm-ia64/unistd.h | 3 ++- include/asm-powerpc/unistd.h | 3 ++- include/asm-x86_64/unistd.h | 4 +++- include/linux/fs.h | 4 ++++ include/linux/syscalls.h | 2 ++ 6 files changed, 15 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h index 014e3562895b..789e9bdd0a40 100644 --- a/include/asm-i386/unistd.h +++ b/include/asm-i386/unistd.h @@ -318,8 +318,9 @@ #define __NR_unshare 310 #define __NR_set_robust_list 311 #define __NR_get_robust_list 312 +#define __NR_sys_splice 313 -#define NR_syscalls 313 +#define NR_syscalls 314 /* * user-visible error numbers are in the range -1 - -128: see diff --git a/include/asm-ia64/unistd.h b/include/asm-ia64/unistd.h index 019956c613e4..36070c1014d8 100644 --- a/include/asm-ia64/unistd.h +++ b/include/asm-ia64/unistd.h @@ -285,12 +285,13 @@ #define __NR_faccessat 1293 /* 1294, 1295 reserved for pselect/ppoll */ #define __NR_unshare 1296 +#define __NR_splice 1297 #ifdef __KERNEL__ #include -#define NR_syscalls 273 /* length of syscall table */ +#define NR_syscalls 274 /* length of syscall table */ #define __ARCH_WANT_SYS_RT_SIGACTION diff --git a/include/asm-powerpc/unistd.h b/include/asm-powerpc/unistd.h index 1e990747dce7..536ba0873052 100644 --- a/include/asm-powerpc/unistd.h +++ b/include/asm-powerpc/unistd.h @@ -301,8 +301,9 @@ #define __NR_pselect6 280 #define __NR_ppoll 281 #define __NR_unshare 282 +#define __NR_splice 283 -#define __NR_syscalls 283 +#define __NR_syscalls 284 #ifdef __KERNEL__ #define __NR__exit __NR_exit diff --git a/include/asm-x86_64/unistd.h b/include/asm-x86_64/unistd.h index fcc516353087..f21ff2c1e960 100644 --- a/include/asm-x86_64/unistd.h +++ b/include/asm-x86_64/unistd.h @@ -609,8 +609,10 @@ __SYSCALL(__NR_unshare, sys_unshare) __SYSCALL(__NR_set_robust_list, sys_set_robust_list) #define __NR_get_robust_list 274 __SYSCALL(__NR_get_robust_list, sys_get_robust_list) +#define __NR_splice 275 +__SYSCALL(__NR_splice, sys_splice) -#define __NR_syscall_max __NR_get_robust_list +#define __NR_syscall_max __NR_splice #ifndef __NO_STUBS diff --git a/include/linux/fs.h b/include/linux/fs.h index 408fe89498f4..20fa5f6d7269 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1032,6 +1032,8 @@ struct file_operations { int (*check_flags)(int); int (*dir_notify)(struct file *filp, unsigned long arg); int (*flock) (struct file *, int, struct file_lock *); + ssize_t (*splice_write)(struct inode *, struct file *, size_t, unsigned int); + ssize_t (*splice_read)(struct file *, struct inode *, size_t, unsigned int); }; struct inode_operations { @@ -1609,6 +1611,8 @@ extern ssize_t generic_file_sendfile(struct file *, loff_t *, size_t, read_actor extern void do_generic_mapping_read(struct address_space *mapping, struct file_ra_state *, struct file *, loff_t *, read_descriptor_t *, read_actor_t); +extern ssize_t generic_file_splice_read(struct file *, struct inode *, size_t, unsigned int); +extern ssize_t generic_file_splice_write(struct inode *, struct file *, size_t, unsigned int); extern void file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping); extern ssize_t generic_file_readv(struct file *filp, const struct iovec *iov, diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e487e3b60f60..e78ffc7d5b56 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -569,5 +569,7 @@ asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user * filename, asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode); asmlinkage long sys_unshare(unsigned long unshare_flags); +asmlinkage long sys_splice(int fdin, int fdout, size_t len, + unsigned int flags); #endif -- cgit v1.2.3 From 5abc97aa25b2c41413b3a520faee83f2282d9f18 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 30 Mar 2006 15:16:46 +0200 Subject: [PATCH] splice: add support for SPLICE_F_MOVE flag This enables the caller to migrate pages from one address space page cache to another. In buzz word marketing, you can do zero-copy file copies! Signed-off-by: Jens Axboe Signed-off-by: Linus Torvalds --- include/linux/pipe_fs_i.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include') diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index b12e59c75752..75c7f55023ab 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -9,6 +9,7 @@ struct pipe_buffer { struct page *page; unsigned int offset, len; struct pipe_buf_operations *ops; + unsigned int stolen; }; struct pipe_buf_operations { @@ -16,6 +17,7 @@ struct pipe_buf_operations { void * (*map)(struct file *, struct pipe_inode_info *, struct pipe_buffer *); void (*unmap)(struct pipe_inode_info *, struct pipe_buffer *); void (*release)(struct pipe_inode_info *, struct pipe_buffer *); + int (*steal)(struct pipe_inode_info *, struct pipe_buffer *); }; struct pipe_inode_info { @@ -53,4 +55,10 @@ void pipe_wait(struct inode * inode); struct inode* pipe_new(struct inode* inode); void free_pipe_info(struct inode* inode); +/* + * splice is tied to pipes as a transport (at least for now), so we'll just + * add the splice flags here. + */ +#define SPLICE_F_MOVE (0x01) /* move pages instead of copying */ + #endif -- cgit v1.2.3 From f19180056ea09ec6a5d32e741234451a1e6eba4d Mon Sep 17 00:00:00 2001 From: "Zhang, Yanmin" Date: Mon, 27 Feb 2006 11:37:45 +0800 Subject: [IA64] Export cpu cache info by sysfs The patch exports 8 attributes of cpu cache info under /sys/devices/system/cpu/cpuX/cache/indexX: 1) level 2) type 3) coherency_line_size 4) ways_of_associativity 5) size 6) shared_cpu_map 7) attributes 8) number_of_sets: number_of_sets=size/ways_of_associativity/coherency_line_size. Signed-off-by: Zhang Yanmin Signed-off-by: Tony Luck --- include/asm-ia64/pal.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'include') diff --git a/include/asm-ia64/pal.h b/include/asm-ia64/pal.h index 4e7e6f23b08c..5d229c5953e9 100644 --- a/include/asm-ia64/pal.h +++ b/include/asm-ia64/pal.h @@ -68,6 +68,7 @@ #define PAL_SHUTDOWN 40 /* enter processor shutdown state */ #define PAL_PREFETCH_VISIBILITY 41 /* Make Processor Prefetches Visible */ #define PAL_LOGICAL_TO_PHYSICAL 42 /* returns information on logical to physical processor mapping */ +#define PAL_CACHE_SHARED_INFO 43 /* returns information on caches shared by logical processor */ #define PAL_COPY_PAL 256 /* relocate PAL procedures and PAL PMI */ #define PAL_HALT_INFO 257 /* return the low power capabilities of processor */ @@ -1647,6 +1648,33 @@ ia64_pal_logical_to_phys(u64 proc_number, pal_logical_to_physical_t *mapping) return iprv.status; } + +typedef struct pal_cache_shared_info_s +{ + u64 num_shared; + pal_proc_n_log_info1_t ppli1; + pal_proc_n_log_info2_t ppli2; +} pal_cache_shared_info_t; + +/* Get information on logical to physical processor mappings. */ +static inline s64 +ia64_pal_cache_shared_info(u64 level, + u64 type, + u64 proc_number, + pal_cache_shared_info_t *info) +{ + struct ia64_pal_retval iprv; + + PAL_CALL(iprv, PAL_CACHE_SHARED_INFO, level, type, proc_number); + + if (iprv.status == PAL_STATUS_SUCCESS) { + info->num_shared = iprv.v0; + info->ppli1.ppli1_data = iprv.v1; + info->ppli2.ppli2_data = iprv.v2; + } + + return iprv.status; +} #endif /* __ASSEMBLY__ */ #endif /* _ASM_IA64_PAL_H */ -- cgit v1.2.3 From 0803dbed7a23721d091639c9e173c0389dcd524a Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 31 Mar 2006 02:25:46 -0800 Subject: [TCP]: Kill unused extern decl for tcp_v4_hash_connecting() Noticed by Alan Menegotto. Signed-off-by: David S. Miller --- include/net/tcp.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include') diff --git a/include/net/tcp.h b/include/net/tcp.h index 9418f4d1afbb..3c989db8a7aa 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -405,9 +405,6 @@ extern int tcp_disconnect(struct sock *sk, int flags); extern void tcp_unhash(struct sock *sk); -extern int tcp_v4_hash_connecting(struct sock *sk); - - /* From syncookies.c */ extern struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb, struct ip_options *opt); -- cgit v1.2.3 From 025be81e83043f20538dcced1e12c5f8d152fbdb Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Fri, 31 Mar 2006 02:27:06 -0800 Subject: [NET]: Allow skb headroom to be overridden Previously we added NET_IP_ALIGN so an architecture can override the padding done to align headers. The next step is to allow the skb headroom to be overridden. We currently always reserve 16 bytes to grow into, meaning all DMAs start 16 bytes into a cacheline. On ppc64 we really want DMA writes to start on a cacheline boundary, so we increase that headroom to one cacheline. Signed-off-by: Anton Blanchard Signed-off-by: David S. Miller --- include/asm-powerpc/system.h | 5 ++++- include/linux/skbuff.h | 29 +++++++++++++++++++++++++---- 2 files changed, 29 insertions(+), 5 deletions(-) (limited to 'include') diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h index 65f5a7b2646b..d075725bf444 100644 --- a/include/asm-powerpc/system.h +++ b/include/asm-powerpc/system.h @@ -365,8 +365,11 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, * powers of 2 writes until it reaches sufficient alignment). * * Based on this we disable the IP header alignment in network drivers. + * We also modify NET_SKB_PAD to be a cacheline in size, thus maintaining + * cacheline alignment of buffers. */ -#define NET_IP_ALIGN 0 +#define NET_IP_ALIGN 0 +#define NET_SKB_PAD L1_CACHE_BYTES #endif #define arch_align_stack(x) (x) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 613b9513f8b9..c4619a428d9b 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -941,6 +941,25 @@ static inline void skb_reserve(struct sk_buff *skb, int len) #define NET_IP_ALIGN 2 #endif +/* + * The networking layer reserves some headroom in skb data (via + * dev_alloc_skb). This is used to avoid having to reallocate skb data when + * the header has to grow. In the default case, if the header has to grow + * 16 bytes or less we avoid the reallocation. + * + * Unfortunately this headroom changes the DMA alignment of the resulting + * network packet. As for NET_IP_ALIGN, this unaligned DMA is expensive + * on some architectures. An architecture can override this value, + * perhaps setting it to a cacheline in size (since that will maintain + * cacheline alignment of the DMA). It must be a power of 2. + * + * Various parts of the networking layer expect at least 16 bytes of + * headroom, you should not reduce this. + */ +#ifndef NET_SKB_PAD +#define NET_SKB_PAD 16 +#endif + extern int ___pskb_trim(struct sk_buff *skb, unsigned int len, int realloc); static inline void __skb_trim(struct sk_buff *skb, unsigned int len) @@ -1030,9 +1049,9 @@ static inline void __skb_queue_purge(struct sk_buff_head *list) static inline struct sk_buff *__dev_alloc_skb(unsigned int length, gfp_t gfp_mask) { - struct sk_buff *skb = alloc_skb(length + 16, gfp_mask); + struct sk_buff *skb = alloc_skb(length + NET_SKB_PAD, gfp_mask); if (likely(skb)) - skb_reserve(skb, 16); + skb_reserve(skb, NET_SKB_PAD); return skb; } #else @@ -1070,13 +1089,15 @@ static inline struct sk_buff *dev_alloc_skb(unsigned int length) */ static inline int skb_cow(struct sk_buff *skb, unsigned int headroom) { - int delta = (headroom > 16 ? headroom : 16) - skb_headroom(skb); + int delta = (headroom > NET_SKB_PAD ? headroom : NET_SKB_PAD) - + skb_headroom(skb); if (delta < 0) delta = 0; if (delta || skb_cloned(skb)) - return pskb_expand_head(skb, (delta + 15) & ~15, 0, GFP_ATOMIC); + return pskb_expand_head(skb, (delta + (NET_SKB_PAD-1)) & + ~(NET_SKB_PAD-1), 0, GFP_ATOMIC); return 0; } -- cgit v1.2.3 From 2ab9391dea6e36fed13443c29bf97d3be05f5289 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Fri, 31 Mar 2006 10:28:29 -0800 Subject: [IA64] Avoid "u64 foo : 32;" for gcc3 vs. gcc4 compatibility gcc3 thinks that a 32-bit field of a u64 type is itself a u64, so should be printed with "%ld". gcc4 thinks it needs just "%d". Make both versions happy by avoiding this construct. Signed-off-by: Tony Luck --- include/asm-ia64/pal.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/asm-ia64/pal.h b/include/asm-ia64/pal.h index 5d229c5953e9..37e52a2836b0 100644 --- a/include/asm-ia64/pal.h +++ b/include/asm-ia64/pal.h @@ -131,7 +131,7 @@ typedef u64 pal_cache_line_state_t; #define PAL_CACHE_LINE_STATE_MODIFIED 3 /* Modified */ typedef struct pal_freq_ratio { - u64 den : 32, num : 32; /* numerator & denominator */ + u32 den, num; /* numerator & denominator */ } itc_ratio, proc_ratio; typedef union pal_cache_config_info_1_s { @@ -152,10 +152,10 @@ typedef union pal_cache_config_info_1_s { typedef union pal_cache_config_info_2_s { struct { - u64 cache_size : 32, /*cache size in bytes*/ + u32 cache_size; /*cache size in bytes*/ - alias_boundary : 8, /* 39-32 aliased addr + u32 alias_boundary : 8, /* 39-32 aliased addr * separation for max * performance. */ -- cgit v1.2.3 From 48b192686dd20cb1576ae1d8ccd17a07971ef24a Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 31 Mar 2006 02:29:41 -0800 Subject: [PATCH] sem2mutex: drivers/mtd/ Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar Cc: Thomas Gleixner Acked-by: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mtd/blktrans.h | 4 ++-- include/linux/mtd/doc2000.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h index f46afec6fbf8..72fc68c5ee96 100644 --- a/include/linux/mtd/blktrans.h +++ b/include/linux/mtd/blktrans.h @@ -10,7 +10,7 @@ #ifndef __MTD_TRANS_H__ #define __MTD_TRANS_H__ -#include +#include struct hd_geometry; struct mtd_info; @@ -22,7 +22,7 @@ struct mtd_blktrans_dev { struct mtd_blktrans_ops *tr; struct list_head list; struct mtd_info *mtd; - struct semaphore sem; + struct mutex lock; int devnum; int blksize; unsigned long size; diff --git a/include/linux/mtd/doc2000.h b/include/linux/mtd/doc2000.h index 386a52cf8b1b..9addd073bf15 100644 --- a/include/linux/mtd/doc2000.h +++ b/include/linux/mtd/doc2000.h @@ -15,7 +15,7 @@ #define __MTD_DOC2000_H__ #include -#include +#include #define DoC_Sig1 0 #define DoC_Sig2 1 @@ -187,7 +187,7 @@ struct DiskOnChip { int numchips; struct Nand *chips; struct mtd_info *nextdoc; - struct semaphore lock; + struct mutex lock; }; int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]); -- cgit v1.2.3 From 0500abf52109d09bf60d740dec2e41d6cf265688 Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Fri, 31 Mar 2006 02:29:42 -0800 Subject: [PATCH] drivers/mtd/: small cleanups - chips/sharp.c: make two needlessly global functions static - move some declarations to a header file where they belong to Signed-off-by: Adrian Bunk Acked-by: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mtd/inftl.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include') diff --git a/include/linux/mtd/inftl.h b/include/linux/mtd/inftl.h index 0268125a6271..d7eaa40e5ab0 100644 --- a/include/linux/mtd/inftl.h +++ b/include/linux/mtd/inftl.h @@ -52,6 +52,11 @@ struct INFTLrecord { int INFTL_mount(struct INFTLrecord *s); int INFTL_formatblock(struct INFTLrecord *s, int block); +extern char inftlmountrev[]; + +void INFTL_dumptables(struct INFTLrecord *s); +void INFTL_dumpVUchains(struct INFTLrecord *s); + #endif /* __KERNEL__ */ #endif /* __MTD_INFTL_H__ */ -- cgit v1.2.3 From 9bf9e89c3d147ca8cf9622d2d053684fba77a464 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Fri, 31 Mar 2006 02:29:56 -0800 Subject: [PATCH] migrate_pages_to() must be defined for the no swap case Fix migrate_pages_to() definition. Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/migrate.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 7d09962c3c0b..ff0a64073ebc 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -12,7 +12,7 @@ extern void migrate_page_copy(struct page *, struct page *); extern int migrate_page_remove_references(struct page *, struct page *, int); extern int migrate_pages(struct list_head *l, struct list_head *t, struct list_head *moved, struct list_head *failed); -int migrate_pages_to(struct list_head *pagelist, +extern int migrate_pages_to(struct list_head *pagelist, struct vm_area_struct *vma, int dest); extern int fail_migrate_page(struct page *, struct page *); @@ -26,6 +26,9 @@ static inline int putback_lru_pages(struct list_head *l) { return 0; } static inline int migrate_pages(struct list_head *l, struct list_head *t, struct list_head *moved, struct list_head *failed) { return -ENOSYS; } +static inline int migrate_pages_to(struct list_head *pagelist, + struct vm_area_struct *vma, int dest) { return 0; } + static inline int migrate_prep(void) { return -ENOSYS; } /* Possible settings for the migrate_page() method in address_operations */ -- cgit v1.2.3 From 93fac7041f082297b93655a0e49f659cd7520e40 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Fri, 31 Mar 2006 02:29:56 -0800 Subject: [PATCH] mm: schedule find_trylock_page() removal find_trylock_page() is an odd interface in that it doesn't take a reference like the others. Now that XFS no longer uses it, and its last remaining caller actually wants an elevated refcount, opencode that callsite and schedule find_trylock_page() for removal. Signed-off-by: Nick Piggin Acked-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pagemap.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 839f0b3c23aa..9539efd4f7e6 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -72,8 +72,8 @@ extern struct page * find_get_page(struct address_space *mapping, unsigned long index); extern struct page * find_lock_page(struct address_space *mapping, unsigned long index); -extern struct page * find_trylock_page(struct address_space *mapping, - unsigned long index); +extern __deprecated_for_modules struct page * find_trylock_page( + struct address_space *mapping, unsigned long index); extern struct page * find_or_create_page(struct address_space *mapping, unsigned long index, gfp_t gfp_mask); unsigned find_get_pages(struct address_space *mapping, pgoff_t start, -- cgit v1.2.3 From 3ccfb81e871b45e4af6ebb3282f3cfa0f98f1b80 Mon Sep 17 00:00:00 2001 From: Brian Gerst Date: Fri, 31 Mar 2006 02:30:04 -0800 Subject: [PATCH] Remove long dead i386 floppy asm code It's been disabled since v2.1.88 Signed-off-by: Brian Gerst Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-i386/floppy.h | 34 ---------------------------------- 1 file changed, 34 deletions(-) (limited to 'include') diff --git a/include/asm-i386/floppy.h b/include/asm-i386/floppy.h index 79727afb94c9..03403045c182 100644 --- a/include/asm-i386/floppy.h +++ b/include/asm-i386/floppy.h @@ -56,7 +56,6 @@ static irqreturn_t floppy_hardint(int irq, void *dev_id, struct pt_regs * regs) register unsigned char st; #undef TRACE_FLPY_INT -#define NO_FLOPPY_ASSEMBLER #ifdef TRACE_FLPY_INT static int calls=0; @@ -71,38 +70,6 @@ static irqreturn_t floppy_hardint(int irq, void *dev_id, struct pt_regs * regs) bytes = virtual_dma_count; #endif -#ifndef NO_FLOPPY_ASSEMBLER - __asm__ ( - "testl %1,%1" - "je 3f" -"1: inb %w4,%b0" - "andb $160,%b0" - "cmpb $160,%b0" - "jne 2f" - "incw %w4" - "testl %3,%3" - "jne 4f" - "inb %w4,%b0" - "movb %0,(%2)" - "jmp 5f" -"4: movb (%2),%0" - "outb %b0,%w4" -"5: decw %w4" - "outb %0,$0x80" - "decl %1" - "incl %2" - "testl %1,%1" - "jne 1b" -"3: inb %w4,%b0" -"2: " - : "=a" ((char) st), - "=c" ((long) virtual_dma_count), - "=S" ((long) virtual_dma_addr) - : "b" ((long) virtual_dma_mode), - "d" ((short) virtual_dma_port+4), - "1" ((long) virtual_dma_count), - "2" ((long) virtual_dma_addr)); -#else { register int lcount; register char *lptr; @@ -122,7 +89,6 @@ static irqreturn_t floppy_hardint(int irq, void *dev_id, struct pt_regs * regs) virtual_dma_addr = lptr; st = inb(virtual_dma_port+4); } -#endif #ifdef TRACE_FLPY_INT calls++; -- cgit v1.2.3 From 1a75a3f0680d9c4bc4761512658b6fd664032e18 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Fri, 31 Mar 2006 02:30:05 -0800 Subject: [PATCH] i386 kdump timer vector lockup fix Porting the patch I posted for x86_64 to i386. http://marc.theaimsgroup.com/?l=linux-kernel&m=114178139610707&w=2 o While using kdump, after a system crash when second kernel boots, timer vector gets (0x31) locked and CPU does not see timer interrupts travelling from IOAPIC to APIC. Currently it does not lead to boot failure in second kernel as timer interrupts continues to come as ExtInt through LAPIC directly, but fixing it is good in case some boards do not support the other mode. o After a system crash, it is not safe to service interrupts any more, hence interrupts are disabled. This leads to pending interrupts at LAPIC. LAPIC sends these interrupts to the CPU during early boot of second kernel. Other pending interrupts are discarded saying unexpected trap but timer interrupt is serviced and CPU does not issue an LAPIC EOI because it think this interrupt came from i8259 and sends ack to 8259. This leads to vector 0x31 locking as LAPIC does not clear respective ISR and keeps on waiting for EOI. o This patch issues extra EOI for the pending interrupts who have ISR set. o Though today only timer seems to be the special case because in early boot it thinks interrupts are coming from i8259 and uses mask_and_ack_8259A() as ack handler and does not issue LAPIC EOI. But probably doing it in generic manner for all vectors makes sense. Signed-off-by: Vivek Goyal Cc: "Eric W. Biederman" Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-i386/apicdef.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/asm-i386/apicdef.h b/include/asm-i386/apicdef.h index 03185cef8e0a..5e4a35af2921 100644 --- a/include/asm-i386/apicdef.h +++ b/include/asm-i386/apicdef.h @@ -37,6 +37,7 @@ #define APIC_SPIV_FOCUS_DISABLED (1<<9) #define APIC_SPIV_APIC_ENABLED (1<<8) #define APIC_ISR 0x100 +#define APIC_ISR_NR 0x8 /* Number of 32 bit ISR registers. */ #define APIC_TMR 0x180 #define APIC_IRR 0x200 #define APIC_ESR 0x280 -- cgit v1.2.3 From 4d338e1accfc3473f7e453427dfd4f1ebf4dbbe6 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 31 Mar 2006 02:30:15 -0800 Subject: [PATCH] uml: sparse cleanups misc sparse annotations Signed-off-by: Al Viro Signed-off-by: Jeff Dike Cc: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-um/ptrace-generic.h | 2 +- include/asm-um/thread_info.h | 16 ++++++++-------- include/asm-um/uaccess.h | 2 +- 3 files changed, 10 insertions(+), 10 deletions(-) (limited to 'include') diff --git a/include/asm-um/ptrace-generic.h b/include/asm-um/ptrace-generic.h index 46599ac44037..8c57e384cb8a 100644 --- a/include/asm-um/ptrace-generic.h +++ b/include/asm-um/ptrace-generic.h @@ -28,7 +28,7 @@ struct pt_regs { union uml_pt_regs regs; }; -#define EMPTY_REGS { regs : EMPTY_UML_PT_REGS } +#define EMPTY_REGS { .regs = EMPTY_UML_PT_REGS } #define PT_REGS_IP(r) UPT_IP(&(r)->regs) #define PT_REGS_SP(r) UPT_SP(&(r)->regs) diff --git a/include/asm-um/thread_info.h b/include/asm-um/thread_info.h index 17b6b07c4332..f166b9837c6a 100644 --- a/include/asm-um/thread_info.h +++ b/include/asm-um/thread_info.h @@ -27,14 +27,14 @@ struct thread_info { #define INIT_THREAD_INFO(tsk) \ { \ - task: &tsk, \ - exec_domain: &default_exec_domain, \ - flags: 0, \ - cpu: 0, \ - preempt_count: 1, \ - addr_limit: KERNEL_DS, \ - restart_block: { \ - fn: do_no_restart_syscall, \ + .task = &tsk, \ + .exec_domain = &default_exec_domain, \ + .flags = 0, \ + .cpu = 0, \ + .preempt_count = 1, \ + .addr_limit = KERNEL_DS, \ + .restart_block = { \ + .fn = do_no_restart_syscall, \ }, \ } diff --git a/include/asm-um/uaccess.h b/include/asm-um/uaccess.h index 4e460d6f5ac8..bea5a015f667 100644 --- a/include/asm-um/uaccess.h +++ b/include/asm-um/uaccess.h @@ -57,7 +57,7 @@ ({ \ const __typeof__((*(ptr))) __user *private_ptr = (ptr); \ (access_ok(VERIFY_READ, private_ptr, sizeof(*private_ptr)) ? \ - __get_user(x, private_ptr) : ((x) = 0, -EFAULT)); \ + __get_user(x, private_ptr) : ((x) = (__typeof__(*ptr))0, -EFAULT)); \ }) #define __put_user(x, ptr) \ -- cgit v1.2.3 From fbdf2161552a2065047e5df2dbf9ebf69d66a0e9 Mon Sep 17 00:00:00 2001 From: Paolo 'Blaisorblade' Giarrusso Date: Fri, 31 Mar 2006 02:30:19 -0800 Subject: [PATCH] uml: split ldt.h in arch-independent and arch-dependant code ldt-{i386,x86_64}.h is made of two different parts - some code for parsing of LDT descriptors, which is arch-dependant, and the code to handle uml_ldt_t (an LDT block inside UML), which is mostly arch-independant (among x86 and x86_64, at least). Join the common part in a single file (ldt.h) and split the rest away (host_ldt-{i386,x86_64}.h). This is needed because processor.h, with next patches, will start including the LDT descriptor parsing macros in host_ldt.h, but it can't include ldt.h because it uses semaphores (and to define semaphores one must first include processor.h!). Signed-off-by: Paolo 'Blaisorblade' Giarrusso Acked-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-um/host_ldt-i386.h | 34 +++++++++++++++++++ include/asm-um/host_ldt-x86_64.h | 38 +++++++++++++++++++++ include/asm-um/ldt-i386.h | 69 ------------------------------------- include/asm-um/ldt-x86_64.h | 73 ---------------------------------------- include/asm-um/ldt.h | 41 ++++++++++++++++++++++ 5 files changed, 113 insertions(+), 142 deletions(-) create mode 100644 include/asm-um/host_ldt-i386.h create mode 100644 include/asm-um/host_ldt-x86_64.h delete mode 100644 include/asm-um/ldt-i386.h delete mode 100644 include/asm-um/ldt-x86_64.h create mode 100644 include/asm-um/ldt.h (limited to 'include') diff --git a/include/asm-um/host_ldt-i386.h b/include/asm-um/host_ldt-i386.h new file mode 100644 index 000000000000..b27cb0a9dd30 --- /dev/null +++ b/include/asm-um/host_ldt-i386.h @@ -0,0 +1,34 @@ +#ifndef __ASM_HOST_LDT_I386_H +#define __ASM_HOST_LDT_I386_H + +#include "asm/arch/ldt.h" + +/* + * macros stolen from include/asm-i386/desc.h + */ +#define LDT_entry_a(info) \ + ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) + +#define LDT_entry_b(info) \ + (((info)->base_addr & 0xff000000) | \ + (((info)->base_addr & 0x00ff0000) >> 16) | \ + ((info)->limit & 0xf0000) | \ + (((info)->read_exec_only ^ 1) << 9) | \ + ((info)->contents << 10) | \ + (((info)->seg_not_present ^ 1) << 15) | \ + ((info)->seg_32bit << 22) | \ + ((info)->limit_in_pages << 23) | \ + ((info)->useable << 20) | \ + 0x7000) + +#define LDT_empty(info) (\ + (info)->base_addr == 0 && \ + (info)->limit == 0 && \ + (info)->contents == 0 && \ + (info)->read_exec_only == 1 && \ + (info)->seg_32bit == 0 && \ + (info)->limit_in_pages == 0 && \ + (info)->seg_not_present == 1 && \ + (info)->useable == 0 ) + +#endif diff --git a/include/asm-um/host_ldt-x86_64.h b/include/asm-um/host_ldt-x86_64.h new file mode 100644 index 000000000000..74a63f7d9a90 --- /dev/null +++ b/include/asm-um/host_ldt-x86_64.h @@ -0,0 +1,38 @@ +#ifndef __ASM_HOST_LDT_X86_64_H +#define __ASM_HOST_LDT_X86_64_H + +#include "asm/arch/ldt.h" + +/* + * macros stolen from include/asm-x86_64/desc.h + */ +#define LDT_entry_a(info) \ + ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) + +/* Don't allow setting of the lm bit. It is useless anyways because + * 64bit system calls require __USER_CS. */ +#define LDT_entry_b(info) \ + (((info)->base_addr & 0xff000000) | \ + (((info)->base_addr & 0x00ff0000) >> 16) | \ + ((info)->limit & 0xf0000) | \ + (((info)->read_exec_only ^ 1) << 9) | \ + ((info)->contents << 10) | \ + (((info)->seg_not_present ^ 1) << 15) | \ + ((info)->seg_32bit << 22) | \ + ((info)->limit_in_pages << 23) | \ + ((info)->useable << 20) | \ + /* ((info)->lm << 21) | */ \ + 0x7000) + +#define LDT_empty(info) (\ + (info)->base_addr == 0 && \ + (info)->limit == 0 && \ + (info)->contents == 0 && \ + (info)->read_exec_only == 1 && \ + (info)->seg_32bit == 0 && \ + (info)->limit_in_pages == 0 && \ + (info)->seg_not_present == 1 && \ + (info)->useable == 0 && \ + (info)->lm == 0) + +#endif diff --git a/include/asm-um/ldt-i386.h b/include/asm-um/ldt-i386.h deleted file mode 100644 index 175722a91164..000000000000 --- a/include/asm-um/ldt-i386.h +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright (C) 2004 Fujitsu Siemens Computers GmbH - * Licensed under the GPL - * - * Author: Bodo Stroesser - */ - -#ifndef __ASM_LDT_I386_H -#define __ASM_LDT_I386_H - -#include "asm/semaphore.h" -#include "asm/arch/ldt.h" - -struct mmu_context_skas; -extern void ldt_host_info(void); -extern long init_new_ldt(struct mmu_context_skas * to_mm, - struct mmu_context_skas * from_mm); -extern void free_ldt(struct mmu_context_skas * mm); - -#define LDT_PAGES_MAX \ - ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE) -#define LDT_ENTRIES_PER_PAGE \ - (PAGE_SIZE/LDT_ENTRY_SIZE) -#define LDT_DIRECT_ENTRIES \ - ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE) - -struct ldt_entry { - __u32 a; - __u32 b; -}; - -typedef struct uml_ldt { - int entry_count; - struct semaphore semaphore; - union { - struct ldt_entry * pages[LDT_PAGES_MAX]; - struct ldt_entry entries[LDT_DIRECT_ENTRIES]; - } u; -} uml_ldt_t; - -/* - * macros stolen from include/asm-i386/desc.h - */ -#define LDT_entry_a(info) \ - ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) - -#define LDT_entry_b(info) \ - (((info)->base_addr & 0xff000000) | \ - (((info)->base_addr & 0x00ff0000) >> 16) | \ - ((info)->limit & 0xf0000) | \ - (((info)->read_exec_only ^ 1) << 9) | \ - ((info)->contents << 10) | \ - (((info)->seg_not_present ^ 1) << 15) | \ - ((info)->seg_32bit << 22) | \ - ((info)->limit_in_pages << 23) | \ - ((info)->useable << 20) | \ - 0x7000) - -#define LDT_empty(info) (\ - (info)->base_addr == 0 && \ - (info)->limit == 0 && \ - (info)->contents == 0 && \ - (info)->read_exec_only == 1 && \ - (info)->seg_32bit == 0 && \ - (info)->limit_in_pages == 0 && \ - (info)->seg_not_present == 1 && \ - (info)->useable == 0 ) - -#endif diff --git a/include/asm-um/ldt-x86_64.h b/include/asm-um/ldt-x86_64.h deleted file mode 100644 index 96b35aada79a..000000000000 --- a/include/asm-um/ldt-x86_64.h +++ /dev/null @@ -1,73 +0,0 @@ -/* - * Copyright (C) 2004 Fujitsu Siemens Computers GmbH - * Licensed under the GPL - * - * Author: Bodo Stroesser - */ - -#ifndef __ASM_LDT_X86_64_H -#define __ASM_LDT_X86_64_H - -#include "asm/semaphore.h" -#include "asm/arch/ldt.h" - -struct mmu_context_skas; -extern void ldt_host_info(void); -extern long init_new_ldt(struct mmu_context_skas * to_mm, - struct mmu_context_skas * from_mm); -extern void free_ldt(struct mmu_context_skas * mm); - -#define LDT_PAGES_MAX \ - ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE) -#define LDT_ENTRIES_PER_PAGE \ - (PAGE_SIZE/LDT_ENTRY_SIZE) -#define LDT_DIRECT_ENTRIES \ - ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE) - -struct ldt_entry { - __u32 a; - __u32 b; -}; - -typedef struct uml_ldt { - int entry_count; - struct semaphore semaphore; - union { - struct ldt_entry * pages[LDT_PAGES_MAX]; - struct ldt_entry entries[LDT_DIRECT_ENTRIES]; - } u; -} uml_ldt_t; - -/* - * macros stolen from include/asm-x86_64/desc.h - */ -#define LDT_entry_a(info) \ - ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) - -/* Don't allow setting of the lm bit. It is useless anyways because - * 64bit system calls require __USER_CS. */ -#define LDT_entry_b(info) \ - (((info)->base_addr & 0xff000000) | \ - (((info)->base_addr & 0x00ff0000) >> 16) | \ - ((info)->limit & 0xf0000) | \ - (((info)->read_exec_only ^ 1) << 9) | \ - ((info)->contents << 10) | \ - (((info)->seg_not_present ^ 1) << 15) | \ - ((info)->seg_32bit << 22) | \ - ((info)->limit_in_pages << 23) | \ - ((info)->useable << 20) | \ - /* ((info)->lm << 21) | */ \ - 0x7000) - -#define LDT_empty(info) (\ - (info)->base_addr == 0 && \ - (info)->limit == 0 && \ - (info)->contents == 0 && \ - (info)->read_exec_only == 1 && \ - (info)->seg_32bit == 0 && \ - (info)->limit_in_pages == 0 && \ - (info)->seg_not_present == 1 && \ - (info)->useable == 0 && \ - (info)->lm == 0) - -#endif diff --git a/include/asm-um/ldt.h b/include/asm-um/ldt.h new file mode 100644 index 000000000000..96f82a456ce6 --- /dev/null +++ b/include/asm-um/ldt.h @@ -0,0 +1,41 @@ +/* + * Copyright (C) 2004 Fujitsu Siemens Computers GmbH + * Licensed under the GPL + * + * Author: Bodo Stroesser + */ + +#ifndef __ASM_LDT_H +#define __ASM_LDT_H + +#include "asm/semaphore.h" +#include "asm/host_ldt.h" + +struct mmu_context_skas; +extern void ldt_host_info(void); +extern long init_new_ldt(struct mmu_context_skas * to_mm, + struct mmu_context_skas * from_mm); +extern void free_ldt(struct mmu_context_skas * mm); + +#define LDT_PAGES_MAX \ + ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE) +#define LDT_ENTRIES_PER_PAGE \ + (PAGE_SIZE/LDT_ENTRY_SIZE) +#define LDT_DIRECT_ENTRIES \ + ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE) + +struct ldt_entry { + __u32 a; + __u32 b; +}; + +typedef struct uml_ldt { + int entry_count; + struct semaphore semaphore; + union { + struct ldt_entry * pages[LDT_PAGES_MAX]; + struct ldt_entry entries[LDT_DIRECT_ENTRIES]; + } u; +} uml_ldt_t; + +#endif -- cgit v1.2.3 From aa6758d4867cd07bd76105ade6177fe6148e559a Mon Sep 17 00:00:00 2001 From: Paolo 'Blaisorblade' Giarrusso Date: Fri, 31 Mar 2006 02:30:22 -0800 Subject: [PATCH] uml: implement {get,set}_thread_area for i386 Implement sys_[gs]et_thread_area and the corresponding ptrace operations for UML. This is the main chunk, additional parts follow. This implementation is now well tested and has run reliably for some time, and we've understood all the previously existing problems. Their implementation saves the new GDT content and then forwards the call to the host when appropriate, i.e. immediately when the target process is running or on context switch otherwise (i.e. on fork and on ptrace() calls). In SKAS mode, we must switch registers on each context switch (because SKAS does not switches tls_array together with current->mm). Also, added get_cpu() locking; this has been done for SKAS mode, since TT does not need it (it does not use smp_processor_id()). Signed-off-by: Paolo 'Blaisorblade' Giarrusso Acked-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-um/desc.h | 12 +++++++++++- include/asm-um/processor-i386.h | 35 +++++++++++++++++++++++++++++---- include/asm-um/processor-x86_64.h | 9 +++++++++ include/asm-um/ptrace-generic.h | 14 +++---------- include/asm-um/ptrace-i386.h | 41 ++++++++++++++++++++++++++++----------- include/asm-um/ptrace-x86_64.h | 35 ++++++++++++++++++++++----------- include/asm-um/segment.h | 2 ++ 7 files changed, 110 insertions(+), 38 deletions(-) (limited to 'include') diff --git a/include/asm-um/desc.h b/include/asm-um/desc.h index ac1d2a20d178..4ec34a51b62c 100644 --- a/include/asm-um/desc.h +++ b/include/asm-um/desc.h @@ -1,6 +1,16 @@ #ifndef __UM_DESC_H #define __UM_DESC_H -#include "asm/arch/desc.h" +/* Taken from asm-i386/desc.h, it's the only thing we need. The rest wouldn't + * compile, and has never been used. */ +#define LDT_empty(info) (\ + (info)->base_addr == 0 && \ + (info)->limit == 0 && \ + (info)->contents == 0 && \ + (info)->read_exec_only == 1 && \ + (info)->seg_32bit == 0 && \ + (info)->limit_in_pages == 0 && \ + (info)->seg_not_present == 1 && \ + (info)->useable == 0 ) #endif diff --git a/include/asm-um/processor-i386.h b/include/asm-um/processor-i386.h index 4108a579eb92..595f1c3e1e40 100644 --- a/include/asm-um/processor-i386.h +++ b/include/asm-um/processor-i386.h @@ -1,4 +1,4 @@ -/* +/* * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ @@ -6,21 +6,48 @@ #ifndef __UM_PROCESSOR_I386_H #define __UM_PROCESSOR_I386_H +#include "linux/string.h" +#include "asm/host_ldt.h" +#include "asm/segment.h" + extern int host_has_xmm; extern int host_has_cmov; /* include faultinfo structure */ #include "sysdep/faultinfo.h" +struct uml_tls_struct { + struct user_desc tls; + unsigned flushed:1; + unsigned present:1; +}; + struct arch_thread { + struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; unsigned long debugregs[8]; int debugregs_seq; struct faultinfo faultinfo; }; -#define INIT_ARCH_THREAD { .debugregs = { [ 0 ... 7 ] = 0 }, \ - .debugregs_seq = 0, \ - .faultinfo = { 0, 0, 0 } } +#define INIT_ARCH_THREAD { \ + .tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \ + { .present = 0, .flushed = 0 } }, \ + .debugregs = { [ 0 ... 7 ] = 0 }, \ + .debugregs_seq = 0, \ + .faultinfo = { 0, 0, 0 } \ +} + +static inline void arch_flush_thread(struct arch_thread *thread) +{ + /* Clear any TLS still hanging */ + memset(&thread->tls_array, 0, sizeof(thread->tls_array)); +} + +static inline void arch_copy_thread(struct arch_thread *from, + struct arch_thread *to) +{ + memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array)); +} #include "asm/arch/user.h" diff --git a/include/asm-um/processor-x86_64.h b/include/asm-um/processor-x86_64.h index e1e1255a1d36..10609af376c0 100644 --- a/include/asm-um/processor-x86_64.h +++ b/include/asm-um/processor-x86_64.h @@ -28,6 +28,15 @@ extern inline void rep_nop(void) .debugregs_seq = 0, \ .faultinfo = { 0, 0, 0 } } +static inline void arch_flush_thread(struct arch_thread *thread) +{ +} + +static inline void arch_copy_thread(struct arch_thread *from, + struct arch_thread *to) +{ +} + #include "asm/arch/user.h" #define current_text_addr() \ diff --git a/include/asm-um/ptrace-generic.h b/include/asm-um/ptrace-generic.h index 8c57e384cb8a..503484305e67 100644 --- a/include/asm-um/ptrace-generic.h +++ b/include/asm-um/ptrace-generic.h @@ -60,17 +60,9 @@ extern void show_regs(struct pt_regs *regs); extern void send_sigtrap(struct task_struct *tsk, union uml_pt_regs *regs, int error_code); -#endif +extern int arch_copy_tls(struct task_struct *new); +extern void clear_flushed_tls(struct task_struct *task); #endif -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +#endif diff --git a/include/asm-um/ptrace-i386.h b/include/asm-um/ptrace-i386.h index fe882b9d917e..30656c962d74 100644 --- a/include/asm-um/ptrace-i386.h +++ b/include/asm-um/ptrace-i386.h @@ -8,8 +8,11 @@ #define HOST_AUDIT_ARCH AUDIT_ARCH_I386 +#include "linux/compiler.h" #include "sysdep/ptrace.h" #include "asm/ptrace-generic.h" +#include "asm/host_ldt.h" +#include "choose-mode.h" #define PT_REGS_EAX(r) UPT_EAX(&(r)->regs) #define PT_REGS_EBX(r) UPT_EBX(&(r)->regs) @@ -38,15 +41,31 @@ #define user_mode(r) UPT_IS_USER(&(r)->regs) -#endif +extern int ptrace_get_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc); -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +extern int ptrace_set_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc); + +extern int do_set_thread_area_skas(struct user_desc *info); +extern int do_get_thread_area_skas(struct user_desc *info); + +extern int do_set_thread_area_tt(struct user_desc *info); +extern int do_get_thread_area_tt(struct user_desc *info); + +extern int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to); +extern int arch_switch_tls_tt(struct task_struct *from, struct task_struct *to); + +static inline int do_get_thread_area(struct user_desc *info) +{ + return CHOOSE_MODE_PROC(do_get_thread_area_tt, do_get_thread_area_skas, info); +} + +static inline int do_set_thread_area(struct user_desc *info) +{ + return CHOOSE_MODE_PROC(do_set_thread_area_tt, do_set_thread_area_skas, info); +} + +struct task_struct; + +#endif diff --git a/include/asm-um/ptrace-x86_64.h b/include/asm-um/ptrace-x86_64.h index be51219a8ffe..c894e68b1f96 100644 --- a/include/asm-um/ptrace-x86_64.h +++ b/include/asm-um/ptrace-x86_64.h @@ -8,6 +8,8 @@ #define __UM_PTRACE_X86_64_H #include "linux/compiler.h" +#include "asm/errno.h" +#include "asm/host_ldt.h" #define signal_fault signal_fault_x86_64 #define __FRAME_OFFSETS /* Needed to get the R* macros */ @@ -63,15 +65,26 @@ void signal_fault(struct pt_regs_subarch *regs, void *frame, char *where); #define profile_pc(regs) PT_REGS_IP(regs) -#endif +static inline int ptrace_get_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc) +{ + return -ENOSYS; +} -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +static inline int ptrace_set_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc) +{ + return -ENOSYS; +} + +static inline void arch_switch_to_tt(struct task_struct *from, + struct task_struct *to) +{ +} + +static inline void arch_switch_to_skas(struct task_struct *from, + struct task_struct *to) +{ +} + +#endif diff --git a/include/asm-um/segment.h b/include/asm-um/segment.h index 55e40301f625..48775452e2cc 100644 --- a/include/asm-um/segment.h +++ b/include/asm-um/segment.h @@ -1,4 +1,6 @@ #ifndef __UM_SEGMENT_H #define __UM_SEGMENT_H +#include "asm/arch/segment.h" + #endif -- cgit v1.2.3 From 3feb88562d149f078319e5a1b2f7acaa10251a5c Mon Sep 17 00:00:00 2001 From: Paolo 'Blaisorblade' Giarrusso Date: Fri, 31 Mar 2006 02:30:25 -0800 Subject: [PATCH] uml: check for differences in host support If running on a host not supporting TLS (for instance 2.4) we should report that cleanly to the user, instead of printing not comprehensible "error 5" for that. Additionally, i386 and x86_64 support different ranges for user_desc->entry_number, and we must account for that; we couldn't pass ourselves -1 because we need to override previously existing TLS descriptors which glibc has possibly set, so test at startup the range to use. x86 and x86_64 existing ranges are hardcoded. Signed-off-by: Paolo 'Blaisorblade' Giarrusso Acked-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-um/segment.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-um/segment.h b/include/asm-um/segment.h index 48775452e2cc..45183fcd10b6 100644 --- a/include/asm-um/segment.h +++ b/include/asm-um/segment.h @@ -1,6 +1,10 @@ #ifndef __UM_SEGMENT_H #define __UM_SEGMENT_H -#include "asm/arch/segment.h" +extern int host_gdt_entry_tls_min; + +#define GDT_ENTRY_TLS_ENTRIES 3 +#define GDT_ENTRY_TLS_MIN host_gdt_entry_tls_min +#define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1) #endif -- cgit v1.2.3 From 97db7fbfc7712bc403330c81c04ddfa82b335bce Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Fri, 31 Mar 2006 02:30:26 -0800 Subject: [PATCH] for_each_possible_cpu: s390 for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by: KAMEZAWA Hiroyuki Cc: Martin Schwidefsky Cc: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-s390/percpu.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-s390/percpu.h b/include/asm-s390/percpu.h index e10ed87094f0..436d216601e5 100644 --- a/include/asm-s390/percpu.h +++ b/include/asm-s390/percpu.h @@ -46,7 +46,7 @@ extern unsigned long __per_cpu_offset[NR_CPUS]; #define percpu_modcopy(pcpudst, src, size) \ do { \ unsigned int __i; \ - for_each_cpu(__i) \ + for_each_possible_cpu(__i) \ memcpy((pcpudst)+__per_cpu_offset[__i], \ (src), (size)); \ } while (0) -- cgit v1.2.3 From 3691c5199e8a4be1c7a91b5ab925db5feb866e19 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 31 Mar 2006 02:30:30 -0800 Subject: [PATCH] kill __init_timer_base in favor of boot_tvec_bases Commit a4a6198b80cf82eb8160603c98da218d1bd5e104: [PATCH] tvec_bases too large for per-cpu data introduced "struct tvec_t_base_s boot_tvec_bases" which is visible at compile time. This means we can kill __init_timer_base and move timer_base_s's content into tvec_t_base_s. Signed-off-by: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/timer.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/linux/timer.h b/include/linux/timer.h index b5caabca553c..0a485beba9f5 100644 --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -6,7 +6,7 @@ #include #include -struct timer_base_s; +struct tvec_t_base_s; struct timer_list { struct list_head entry; @@ -15,16 +15,16 @@ struct timer_list { void (*function)(unsigned long); unsigned long data; - struct timer_base_s *base; + struct tvec_t_base_s *base; }; -extern struct timer_base_s __init_timer_base; +extern struct tvec_t_base_s boot_tvec_bases; #define TIMER_INITIALIZER(_function, _expires, _data) { \ .function = (_function), \ .expires = (_expires), \ .data = (_data), \ - .base = &__init_timer_base, \ + .base = &boot_tvec_bases, \ } #define DEFINE_TIMER(_name, _function, _expires, _data) \ -- cgit v1.2.3 From 68eef3b4791572ecb70249c7fb145bb3742dd899 Mon Sep 17 00:00:00 2001 From: Joe Korty Date: Fri, 31 Mar 2006 02:30:32 -0800 Subject: [PATCH] Simplify proc/devices and fix early termination regression Make baby-simple the code for /proc/devices. Based on the proven design for /proc/interrupts. This also fixes the early-termination regression 2.6.16 introduced, as demonstrated by: # dd if=/proc/devices bs=1 Character devices: 1 mem 27+0 records in 27+0 records out This should also work (but is untested) when /proc/devices >4096 bytes, which I believe is what the original 2.6.16 rewrite fixed. [akpm@osdl.org: cleanups, simplifications] Signed-off-by: Joe Korty Cc: Neil Horman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/fs.h | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) (limited to 'include') diff --git a/include/linux/fs.h b/include/linux/fs.h index 20fa5f6d7269..20a7afd4590c 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1413,6 +1413,7 @@ extern void bd_release_from_disk(struct block_device *, struct gendisk *); #endif /* fs/char_dev.c */ +#define CHRDEV_MAJOR_HASH_SIZE 255 extern int alloc_chrdev_region(dev_t *, unsigned, unsigned, const char *); extern int register_chrdev_region(dev_t, unsigned, const char *); extern int register_chrdev(unsigned int, const char *, @@ -1420,25 +1421,17 @@ extern int register_chrdev(unsigned int, const char *, extern int unregister_chrdev(unsigned int, const char *); extern void unregister_chrdev_region(dev_t, unsigned); extern int chrdev_open(struct inode *, struct file *); -extern int get_chrdev_list(char *); -extern void *acquire_chrdev_list(void); -extern int count_chrdev_list(void); -extern void *get_next_chrdev(void *); -extern int get_chrdev_info(void *, int *, char **); -extern void release_chrdev_list(void *); +extern void chrdev_show(struct seq_file *,off_t); /* fs/block_dev.c */ +#define BLKDEV_MAJOR_HASH_SIZE 255 #define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */ extern const char *__bdevname(dev_t, char *buffer); extern const char *bdevname(struct block_device *bdev, char *buffer); extern struct block_device *lookup_bdev(const char *); extern struct block_device *open_bdev_excl(const char *, int, void *); extern void close_bdev_excl(struct block_device *); -extern void *acquire_blkdev_list(void); -extern int count_blkdev_list(void); -extern void *get_next_blkdev(void *); -extern int get_blkdev_info(void *, int *, char **); -extern void release_blkdev_list(void *); +extern void blkdev_show(struct seq_file *,off_t); extern void init_special_inode(struct inode *, umode_t, dev_t); -- cgit v1.2.3 From 453823ba08ba762b3d58934b6dce75edce37169e Mon Sep 17 00:00:00 2001 From: Corey Minyard Date: Fri, 31 Mar 2006 02:30:39 -0800 Subject: [PATCH] IPMI: fix startup race condition Matt Domsch noticed a startup race with the IPMI kernel thread, it was possible (though extraordinarly unlikely) that a message could come in before the upper layer was ready to handle it. This patch splits the startup processing of an IPMI interface into two parts, one to get ready and one to actually start the processes to receive messages from the interface. [akpm@osdl.org: cleanups] Signed-off-by: Corey Minyard Cc: Matt Domsch Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/ipmi_smi.h | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/ipmi_smi.h b/include/linux/ipmi_smi.h index 53571288a9fc..6d9c7e4da472 100644 --- a/include/linux/ipmi_smi.h +++ b/include/linux/ipmi_smi.h @@ -82,6 +82,13 @@ struct ipmi_smi_handlers { struct module *owner; + /* The low-level interface cannot start sending messages to + the upper layer until this function is called. This may + not be NULL, the lower layer must take the interface from + this call. */ + int (*start_processing)(void *send_info, + ipmi_smi_t new_intf); + /* Called to enqueue an SMI message to be sent. This operation is not allowed to fail. If an error occurs, it should report back the error in a received message. It may @@ -157,13 +164,16 @@ static inline void ipmi_demangle_device_id(unsigned char *data, } /* Add a low-level interface to the IPMI driver. Note that if the - interface doesn't know its slave address, it should pass in zero. */ + interface doesn't know its slave address, it should pass in zero. + The low-level interface should not deliver any messages to the + upper layer until the start_processing() function in the handlers + is called, and the lower layer must get the interface from that + call. */ int ipmi_register_smi(struct ipmi_smi_handlers *handlers, void *send_info, struct ipmi_device_id *device_id, struct device *dev, - unsigned char slave_addr, - ipmi_smi_t *intf); + unsigned char slave_addr); /* * Remove a low-level interface from the IPMI driver. This will -- cgit v1.2.3 From f79e2abb9bd452d97295f34376dedbec9686b986 Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 31 Mar 2006 02:30:42 -0800 Subject: [PATCH] sys_sync_file_range() Remove the recently-added LINUX_FADV_ASYNC_WRITE and LINUX_FADV_WRITE_WAIT fadvise() additions, do it in a new sys_sync_file_range() syscall instead. Reasons: - It's more flexible. Things which would require two or three syscalls with fadvise() can be done in a single syscall. - Using fadvise() in this manner is something not covered by POSIX. The patch wires up the syscall for x86. The sycall is implemented in the new fs/sync.c. The intention is that we can move sys_fsync(), sys_fdatasync() and perhaps sys_sync() into there later. Documentation for the syscall is in fs/sync.c. A test app (sync_file_range.c) is in http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz. The available-to-GPL-modules do_sync_file_range() is for knfsd: "A COMMIT can say NFS_DATA_SYNC or NFS_FILE_SYNC. I can skip the ->fsync call for NFS_DATA_SYNC which is hopefully the more common." Note: the `async' writeout mode SYNC_FILE_RANGE_WRITE will turn synchronous if the queue is congested. This is trivial to fix: add a new flag bit, set wbc->nonblocking. But I'm not sure that we want to expose implementation details down to that level. Note: it's notable that we can sync an fd which wasn't opened for writing. Same with fsync() and fdatasync()). Note: the code takes some care to handle attempts to sync file contents outside the 16TB offset on 32-bit machines. It makes such attempts appear to succeed, for best 32-bit/64-bit compatibility. Perhaps it should make such requests fail... Cc: Nick Piggin Cc: Michael Kerrisk Cc: Ulrich Drepper Cc: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-i386/unistd.h | 3 ++- include/linux/fadvise.h | 6 ------ include/linux/fs.h | 7 +++++++ include/linux/syscalls.h | 2 ++ 4 files changed, 11 insertions(+), 7 deletions(-) (limited to 'include') diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h index 789e9bdd0a40..2e7f3e257fdd 100644 --- a/include/asm-i386/unistd.h +++ b/include/asm-i386/unistd.h @@ -319,8 +319,9 @@ #define __NR_set_robust_list 311 #define __NR_get_robust_list 312 #define __NR_sys_splice 313 +#define __NR_sys_sync_file_range 314 -#define NR_syscalls 314 +#define NR_syscalls 315 /* * user-visible error numbers are in the range -1 - -128: see diff --git a/include/linux/fadvise.h b/include/linux/fadvise.h index b2913bba35d8..e8e747139b9a 100644 --- a/include/linux/fadvise.h +++ b/include/linux/fadvise.h @@ -18,10 +18,4 @@ #define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ #endif -/* - * Linux-specific fadvise() extensions: - */ -#define LINUX_FADV_ASYNC_WRITE 32 /* Start writeout on range */ -#define LINUX_FADV_WRITE_WAIT 33 /* Wait upon writeout to range */ - #endif /* FADVISE_H_INCLUDED */ diff --git a/include/linux/fs.h b/include/linux/fs.h index 20a7afd4590c..4ed7e602d703 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -757,6 +757,13 @@ extern void send_sigio(struct fown_struct *fown, int fd, int band); extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg); extern int fcntl_getlease(struct file *filp); +/* fs/sync.c */ +#define SYNC_FILE_RANGE_WAIT_BEFORE 1 +#define SYNC_FILE_RANGE_WRITE 2 +#define SYNC_FILE_RANGE_WAIT_AFTER 4 +extern int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte, + int flags); + /* fs/locks.c */ extern void locks_init_lock(struct file_lock *); extern void locks_copy_lock(struct file_lock *, struct file_lock *); diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e78ffc7d5b56..5717147596b6 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -571,5 +571,7 @@ asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename, asmlinkage long sys_unshare(unsigned long unshare_flags); asmlinkage long sys_splice(int fdin, int fdout, size_t len, unsigned int flags); +asmlinkage long sys_sync_file_range(int fd, loff_t offset, loff_t nbytes, + int flags); #endif -- cgit v1.2.3 From 2cf8d82d63807c2c68adf20bb28bf502496186dd Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 31 Mar 2006 02:30:49 -0800 Subject: [PATCH] make local_t signed local_t's were defined to be unsigned. This increases confusion because atomic_t's are signed. The patch goes through and changes all implementations to use signed longs throughout. Also, x86-64 was using 32-bit quantities for the value passed into local_add() and local_sub(). Fixed. All (actually, both) existing users have been audited. (Also s/__inline__/inline/ in x86_64/local.h) Cc: Andi Kleen Cc: Benjamin LaHaise Cc: Kyle McMartin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/local.h | 13 ++++++++++--- include/asm-i386/local.h | 6 +++--- include/asm-x86_64/local.h | 10 +++++----- 3 files changed, 18 insertions(+), 11 deletions(-) (limited to 'include') diff --git a/include/asm-generic/local.h b/include/asm-generic/local.h index de4614840c2c..9291c24f5819 100644 --- a/include/asm-generic/local.h +++ b/include/asm-generic/local.h @@ -7,8 +7,15 @@ #include #include -/* An unsigned long type for operations which are atomic for a single - * CPU. Usually used in combination with per-cpu variables. */ +/* + * A signed long type for operations which are atomic for a single CPU. + * Usually used in combination with per-cpu variables. + * + * This is the default implementation, which uses atomic_long_t. Which is + * rather pointless. The whole point behind local_t is that some processors + * can perform atomic adds and subtracts in a manner which is atomic wrt IRQs + * running on this CPU. local_t allows exploitation of such capabilities. + */ /* Implement in terms of atomics. */ @@ -20,7 +27,7 @@ typedef struct #define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) } -#define local_read(l) ((unsigned long)atomic_long_read(&(l)->a)) +#define local_read(l) atomic_long_read(&(l)->a) #define local_set(l,i) atomic_long_set((&(l)->a),(i)) #define local_inc(l) atomic_long_inc(&(l)->a) #define local_dec(l) atomic_long_dec(&(l)->a) diff --git a/include/asm-i386/local.h b/include/asm-i386/local.h index 0177da80dde3..e67fa08260fe 100644 --- a/include/asm-i386/local.h +++ b/include/asm-i386/local.h @@ -5,7 +5,7 @@ typedef struct { - volatile unsigned long counter; + volatile long counter; } local_t; #define LOCAL_INIT(i) { (i) } @@ -29,7 +29,7 @@ static __inline__ void local_dec(local_t *v) :"m" (v->counter)); } -static __inline__ void local_add(unsigned long i, local_t *v) +static __inline__ void local_add(long i, local_t *v) { __asm__ __volatile__( "addl %1,%0" @@ -37,7 +37,7 @@ static __inline__ void local_add(unsigned long i, local_t *v) :"ir" (i), "m" (v->counter)); } -static __inline__ void local_sub(unsigned long i, local_t *v) +static __inline__ void local_sub(long i, local_t *v) { __asm__ __volatile__( "subl %1,%0" diff --git a/include/asm-x86_64/local.h b/include/asm-x86_64/local.h index bf148037d4e5..cd17945bf218 100644 --- a/include/asm-x86_64/local.h +++ b/include/asm-x86_64/local.h @@ -5,7 +5,7 @@ typedef struct { - volatile unsigned long counter; + volatile long counter; } local_t; #define LOCAL_INIT(i) { (i) } @@ -13,7 +13,7 @@ typedef struct #define local_read(v) ((v)->counter) #define local_set(v,i) (((v)->counter) = (i)) -static __inline__ void local_inc(local_t *v) +static inline void local_inc(local_t *v) { __asm__ __volatile__( "incq %0" @@ -21,7 +21,7 @@ static __inline__ void local_inc(local_t *v) :"m" (v->counter)); } -static __inline__ void local_dec(local_t *v) +static inline void local_dec(local_t *v) { __asm__ __volatile__( "decq %0" @@ -29,7 +29,7 @@ static __inline__ void local_dec(local_t *v) :"m" (v->counter)); } -static __inline__ void local_add(unsigned int i, local_t *v) +static inline void local_add(long i, local_t *v) { __asm__ __volatile__( "addq %1,%0" @@ -37,7 +37,7 @@ static __inline__ void local_add(unsigned int i, local_t *v) :"ir" (i), "m" (v->counter)); } -static __inline__ void local_sub(unsigned int i, local_t *v) +static inline void local_sub(long i, local_t *v) { __asm__ __volatile__( "subq %1,%0" -- cgit v1.2.3 From 0ca07731e495584bd84dca15a0f065470d594ec4 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Fri, 31 Mar 2006 02:30:58 -0800 Subject: [PATCH] vt: add TIOCL_GETKMSGREDIRECT Add TIOCL_GETKMSGREDIRECT needed by the userland suspend tool to get the current value of kmsg_redirect from the kernel so that it can save it and restore it after resume. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Cc: Michael Kerrisk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/tiocl.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/tiocl.h b/include/linux/tiocl.h index 2c9e847f6ed1..4756862c4ed4 100644 --- a/include/linux/tiocl.h +++ b/include/linux/tiocl.h @@ -34,5 +34,6 @@ struct tiocl_selection { #define TIOCL_SCROLLCONSOLE 13 /* scroll console */ #define TIOCL_BLANKSCREEN 14 /* keep screen blank even if a key is pressed */ #define TIOCL_BLANKEDSCREEN 15 /* return which vt was blanked */ +#define TIOCL_GETKMSGREDIRECT 17 /* get the vt the kernel messages are restricted to */ #endif /* _LINUX_TIOCL_H */ -- cgit v1.2.3 From c72a1d608dd0eb3d553a08bfdf1c0041bebaa8a0 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Fri, 31 Mar 2006 02:31:04 -0800 Subject: [PATCH] LED: add LED class Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie Cc: Russell King Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/leds.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 include/linux/leds.h (limited to 'include') diff --git a/include/linux/leds.h b/include/linux/leds.h new file mode 100644 index 000000000000..6812640b39cc --- /dev/null +++ b/include/linux/leds.h @@ -0,0 +1,51 @@ +/* + * Driver model for leds and led triggers + * + * Copyright (C) 2005 John Lenz + * Copyright (C) 2005 Richard Purdie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#ifndef __LINUX_LEDS_H_INCLUDED +#define __LINUX_LEDS_H_INCLUDED + +struct device; +struct class_device; +/* + * LED Core + */ + +enum led_brightness { + LED_OFF = 0, + LED_HALF = 127, + LED_FULL = 255, +}; + +struct led_classdev { + const char *name; + int brightness; + int flags; +#define LED_SUSPENDED (1 << 0) + + /* A function to set the brightness of the led */ + void (*brightness_set)(struct led_classdev *led_cdev, + enum led_brightness brightness); + + struct class_device *class_dev; + /* LED Device linked list */ + struct list_head node; + + /* Trigger data */ + char *default_trigger; +}; + +extern int led_classdev_register(struct device *parent, + struct led_classdev *led_cdev); +extern void led_classdev_unregister(struct led_classdev *led_cdev); +extern void led_classdev_suspend(struct led_classdev *led_cdev); +extern void led_classdev_resume(struct led_classdev *led_cdev); + +#endif /* __LINUX_LEDS_H_INCLUDED */ -- cgit v1.2.3 From c3bc9956ec52fb2c70f29aa894d8eec766116584 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Fri, 31 Mar 2006 02:31:05 -0800 Subject: [PATCH] LED: add LED trigger tupport Add support for LED triggers to the LED subsystem. "Triggers" are events which change the state of an LED. Two kinds of trigger are available, simple ones which can be added to exising code with minimum disruption and complex ones for implementing new or more complex functionality. Signed-off-by: Richard Purdie Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/leds.h | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) (limited to 'include') diff --git a/include/linux/leds.h b/include/linux/leds.h index 6812640b39cc..404575c3dd5a 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -40,6 +40,14 @@ struct led_classdev { /* Trigger data */ char *default_trigger; +#ifdef CONFIG_LEDS_TRIGGERS + rwlock_t trigger_lock; + /* Protects the trigger data below */ + + struct led_trigger *trigger; + struct list_head trig_list; + void *trigger_data; +#endif }; extern int led_classdev_register(struct device *parent, @@ -48,4 +56,48 @@ extern void led_classdev_unregister(struct led_classdev *led_cdev); extern void led_classdev_suspend(struct led_classdev *led_cdev); extern void led_classdev_resume(struct led_classdev *led_cdev); +/* + * LED Triggers + */ +#ifdef CONFIG_LEDS_TRIGGERS + +#define TRIG_NAME_MAX 50 + +struct led_trigger { + /* Trigger Properties */ + const char *name; + void (*activate)(struct led_classdev *led_cdev); + void (*deactivate)(struct led_classdev *led_cdev); + + /* LEDs under control by this trigger (for simple triggers) */ + rwlock_t leddev_list_lock; + struct list_head led_cdevs; + + /* Link to next registered trigger */ + struct list_head next_trig; +}; + +/* Registration functions for complex triggers */ +extern int led_trigger_register(struct led_trigger *trigger); +extern void led_trigger_unregister(struct led_trigger *trigger); + +/* Registration functions for simple triggers */ +#define DEFINE_LED_TRIGGER(x) static struct led_trigger *x; +#define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x; +extern void led_trigger_register_simple(const char *name, + struct led_trigger **trigger); +extern void led_trigger_unregister_simple(struct led_trigger *trigger); +extern void led_trigger_event(struct led_trigger *trigger, + enum led_brightness event); + +#else + +/* Triggers aren't active - null macros */ +#define DEFINE_LED_TRIGGER(x) +#define DEFINE_LED_TRIGGER_GLOBAL(x) +#define led_trigger_register_simple(x, y) do {} while(0) +#define led_trigger_unregister_simple(x) do {} while(0) +#define led_trigger_event(x, y) do {} while(0) + +#endif #endif /* __LINUX_LEDS_H_INCLUDED */ -- cgit v1.2.3 From 2bfb646cdf348cb77c572f06d5b9d17ea205c7e2 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Fri, 31 Mar 2006 02:31:16 -0800 Subject: [PATCH] LED: Add IDE disk activity LED trigger Add an LED trigger for IDE disk activity to the ide-disk driver. Signed-off-by: Richard Purdie Acked-by: Bartlomiej Zolnierkiewicz Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/leds.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include') diff --git a/include/linux/leds.h b/include/linux/leds.h index 404575c3dd5a..4617e75903b0 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -100,4 +100,12 @@ extern void led_trigger_event(struct led_trigger *trigger, #define led_trigger_event(x, y) do {} while(0) #endif + +/* Trigger specific functions */ +#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK +extern void ledtrig_ide_activity(void); +#else +#define ledtrig_ide_activity() do {} while(0) +#endif + #endif /* __LINUX_LEDS_H_INCLUDED */ -- cgit v1.2.3 From 00362e33f65f1cb5d15e62ea5509520ce2770360 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 31 Mar 2006 02:31:17 -0800 Subject: [PATCH] hrtimer: create generic sleeper The removal of the data field in the hrtimer structure enforces the embedding of the timer into another data structure. nanosleep now uses a private implementation of the most common used timer callback function (simple task wakeup). In order to avoid the reimplentation of such functionality all over the place a generic hrtimer_sleeper functionality is created. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/hrtimer.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include') diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 93830158348e..b20939287613 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -57,6 +57,19 @@ struct hrtimer { struct hrtimer_base *base; }; +/** + * struct hrtimer_sleeper - simple sleeper structure + * + * @timer: embedded timer structure + * @task: task to wake up + * + * task is set to NULL, when the timer expires. + */ +struct hrtimer_sleeper { + struct hrtimer timer; + struct task_struct *task; +}; + /** * struct hrtimer_base - the timer base for a specific clock * @@ -127,6 +140,9 @@ extern long hrtimer_nanosleep(struct timespec *rqtp, const enum hrtimer_mode mode, const clockid_t clockid); +extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, + struct task_struct *tsk); + /* Soft interrupt function to run the hrtimer queues: */ extern void hrtimer_run_queues(void); -- cgit v1.2.3 From db1b1fefc2cecbff2e4214062fa8c680cb6e7b7d Mon Sep 17 00:00:00 2001 From: Jack Steiner Date: Fri, 31 Mar 2006 02:31:21 -0800 Subject: [PATCH] sched: reduce overhead of calc_load Currently, count_active_tasks() calls both nr_running() & nr_interruptible(). Each of these functions does a "for_each_cpu" & reads values from the runqueue of each cpu. Although this is not a lot of instructions, each runqueue may be located on different node. Depending on the architecture, a unique TLB entry may be required to access each runqueue. Since there may be more runqueues than cpu TLB entries, a scan of all runqueues can trash the TLB. Each memory reference incurs a TLB miss & refill. In addition, the runqueue cacheline that contains nr_running & nr_uninterruptible may be evicted from the cache between the two passes. This causes unnecessary cache misses. Combining nr_running() & nr_interruptible() into a single function substantially reduces the TLB & cache misses on large systems. This should have no measureable effect on smaller systems. On a 128p IA64 system running a memory stress workload, the new function reduced the overhead of calc_load() from 605 usec/call to 324 usec/call. Signed-off-by: Jack Steiner Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sched.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/sched.h b/include/linux/sched.h index d04186d8cc68..ab84adf5bb9a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -100,6 +100,7 @@ DECLARE_PER_CPU(unsigned long, process_counts); extern int nr_processes(void); extern unsigned long nr_running(void); extern unsigned long nr_uninterruptible(void); +extern unsigned long nr_active(void); extern unsigned long nr_iowait(void); #include -- cgit v1.2.3 From 3dee386e14045484a6c41c8f03a263f9d79de740 Mon Sep 17 00:00:00 2001 From: Con Kolivas Date: Fri, 31 Mar 2006 02:31:23 -0800 Subject: [PATCH] sched: cleanup task_activated() The activated flag in task_struct is used to track different sleep types and its usage is somewhat obfuscated. Convert the variable to an enum with more descriptive names without altering the function. Signed-off-by: Con Kolivas Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sched.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/sched.h b/include/linux/sched.h index ab84adf5bb9a..c4fd3fcd3feb 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -684,6 +684,13 @@ static inline void prefetch_stack(struct task_struct *t) { } struct audit_context; /* See audit.c */ struct mempolicy; +enum sleep_type { + SLEEP_NORMAL, + SLEEP_NONINTERACTIVE, + SLEEP_INTERACTIVE, + SLEEP_INTERRUPTED, +}; + struct task_struct { volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */ struct thread_info *thread_info; @@ -706,7 +713,7 @@ struct task_struct { unsigned long sleep_avg; unsigned long long timestamp, last_ran; unsigned long long sched_time; /* sched_clock time spent running */ - int activated; + enum sleep_type sleep_type; unsigned long policy; cpumask_t cpus_allowed; -- cgit v1.2.3 From d425b274ba83ba4e7746a40446ec0ba3267de51f Mon Sep 17 00:00:00 2001 From: Con Kolivas Date: Fri, 31 Mar 2006 02:31:29 -0800 Subject: [PATCH] sched: activate SCHED BATCH expired To increase the strength of SCHED_BATCH as a scheduling hint we can activate batch tasks on the expired array since by definition they are latency insensitive tasks. Signed-off-by: Con Kolivas Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sched.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/sched.h b/include/linux/sched.h index c4fd3fcd3feb..78c40dd2e19a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -484,6 +484,7 @@ struct signal_struct { #define MAX_PRIO (MAX_RT_PRIO + 40) #define rt_task(p) (unlikely((p)->prio < MAX_RT_PRIO)) +#define batch_task(p) (unlikely((p)->policy == SCHED_BATCH)) /* * Some day this will be a full-fledged user tracking system.. -- cgit v1.2.3 From 158d9ebd19280582da172626ad3edda1a626dace Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 31 Mar 2006 02:31:34 -0800 Subject: [PATCH] resurrect __put_task_struct This just got nuked in mainline. Bring it back because Eric's patches use it. Cc: "Eric W. Biederman" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sched.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/sched.h b/include/linux/sched.h index 78c40dd2e19a..95f248ba36c9 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -906,6 +906,7 @@ extern void free_task(struct task_struct *tsk); #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0) extern void __put_task_struct_cb(struct rcu_head *rhp); +extern void __put_task_struct(struct task_struct *t); static inline void put_task_struct(struct task_struct *t) { -- cgit v1.2.3 From 8c7904a00b06d2ee51149794b619e07369fcf9d4 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 31 Mar 2006 02:31:37 -0800 Subject: [PATCH] task: RCU protect task->usage A big problem with rcu protected data structures that are also reference counted is that you must jump through several hoops to increase the reference count. I think someone finally implemented atomic_inc_not_zero(&count) to automate the common case. Unfortunately this means you must special case the rcu access case. When data structures are only visible via rcu in a manner that is not determined by the reference count on the object (i.e. tasks are visible until their zombies are reaped) there is a much simpler technique we can employ. Simply delaying the decrement of the reference count until the rcu interval is over. What that means is that the proc code that looks up a task and later wants to sleep can now do: rcu_read_lock(); task = find_task_by_pid(some_pid); if (task) { get_task_struct(task); } rcu_read_unlock(); The effect on the rest of the kernel is that put_task_struct becomes cheaper and immediate, and in the case where the task has been reaped it frees the task immediate instead of unnecessarily waiting an until the rcu interval is over. Cleanup of task_struct does not happen when its reference count drops to zero, instead cleanup happens when release_task is called. Tasks can only be looked up via rcu before release_task is called. All rcu protected members of task_struct are freed by release_task. Therefore we can move call_rcu from put_task_struct into release_task. And we can modify release_task to not immediately release the reference count but instead have it call put_task_struct from the function it gives to call_rcu. The end result: - get_task_struct is safe in an rcu context where we have just looked up the task. - put_task_struct() simplifies into its old pre rcu self. This reorganization also makes put_task_struct uncallable from modules as it is not exported but it does not appear to be called from any modules so this should not be an issue, and is trivially fixed. Signed-off-by: Eric W. Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sched.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/sched.h b/include/linux/sched.h index 95f248ba36c9..7e0ff5dba986 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -911,7 +911,7 @@ extern void __put_task_struct(struct task_struct *t); static inline void put_task_struct(struct task_struct *t) { if (atomic_dec_and_test(&t->usage)) - call_rcu(&t->rcu, __put_task_struct_cb); + __put_task_struct(t); } /* -- cgit v1.2.3 From 92476d7fc0326a409ab1d3864a04093a6be9aca7 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 31 Mar 2006 02:31:42 -0800 Subject: [PATCH] pidhash: Refactor the pid hash table Simplifies the code, reduces the need for 4 pid hash tables, and makes the code more capable. In the discussions I had with Oleg it was felt that to a large extent the cleanup itself justified the work. With struct pid being dynamically allocated meant we could create the hash table entry when the pid was allocated and free the hash table entry when the pid was freed. Instead of playing with the hash lists when ever a process would attach or detach to a process. For myself the fact that it gave what my previous task_ref patch gave for free with simpler code was a big win. The problem is that if you hold a reference to struct task_struct you lock in 10K of low memory. If you do that in a user controllable way like /proc does, with an unprivileged but hostile user space application with typical resource limits of 1000 fds and 100 processes I can trigger the OOM killer by consuming all of low memory with task structs, on a machine wight 1GB of low memory. If I instead hold a reference to struct pid which holds a pointer to my task_struct, I don't suffer from that problem because struct pid is 2 orders of magnitude smaller. In fact struct pid is small enough that most other kernel data structures dwarf it, so simply limiting the number of referring data structures is enough to prevent exhaustion of low memory. This splits the current struct pid into two structures, struct pid and struct pid_link, and reduces our number of hash tables from PIDTYPE_MAX to just one. struct pid_link is the per process linkage into the hash tables and lives in struct task_struct. struct pid is given an indepedent lifetime, and holds pointers to each of the pid types. The independent life of struct pid simplifies attach_pid, and detach_pid, because we are always manipulating the list of pids and not the hash table. In addition in giving struct pid an indpendent life it makes the concept much more powerful. Kernel data structures can now embed a struct pid * instead of a pid_t and not suffer from pid wrap around problems or from keeping unnecessarily large amounts of memory allocated. Signed-off-by: Eric W. Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pid.h | 96 +++++++++++++++++++++++++++++++++++++++++++-------- include/linux/sched.h | 4 +-- 2 files changed, 83 insertions(+), 17 deletions(-) (limited to 'include') diff --git a/include/linux/pid.h b/include/linux/pid.h index 5b9082cc600f..29960b03bef7 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -1,6 +1,8 @@ #ifndef _LINUX_PID_H #define _LINUX_PID_H +#include + enum pid_type { PIDTYPE_PID, @@ -9,45 +11,109 @@ enum pid_type PIDTYPE_MAX }; +/* + * What is struct pid? + * + * A struct pid is the kernel's internal notion of a process identifier. + * It refers to individual tasks, process groups, and sessions. While + * there are processes attached to it the struct pid lives in a hash + * table, so it and then the processes that it refers to can be found + * quickly from the numeric pid value. The attached processes may be + * quickly accessed by following pointers from struct pid. + * + * Storing pid_t values in the kernel and refering to them later has a + * problem. The process originally with that pid may have exited and the + * pid allocator wrapped, and another process could have come along + * and been assigned that pid. + * + * Referring to user space processes by holding a reference to struct + * task_struct has a problem. When the user space process exits + * the now useless task_struct is still kept. A task_struct plus a + * stack consumes around 10K of low kernel memory. More precisely + * this is THREAD_SIZE + sizeof(struct task_struct). By comparison + * a struct pid is about 64 bytes. + * + * Holding a reference to struct pid solves both of these problems. + * It is small so holding a reference does not consume a lot of + * resources, and since a new struct pid is allocated when the numeric + * pid value is reused we don't mistakenly refer to new processes. + */ + struct pid { + atomic_t count; /* Try to keep pid_chain in the same cacheline as nr for find_pid */ int nr; struct hlist_node pid_chain; - /* list of pids with the same nr, only one of them is in the hash */ - struct list_head pid_list; + /* lists of tasks that use this pid */ + struct hlist_head tasks[PIDTYPE_MAX]; + struct rcu_head rcu; }; -#define pid_task(elem, type) \ - list_entry(elem, struct task_struct, pids[type].pid_list) +struct pid_link +{ + struct hlist_node node; + struct pid *pid; +}; + +static inline struct pid *get_pid(struct pid *pid) +{ + if (pid) + atomic_inc(&pid->count); + return pid; +} + +extern void FASTCALL(put_pid(struct pid *pid)); +extern struct task_struct *FASTCALL(pid_task(struct pid *pid, enum pid_type)); +extern struct task_struct *FASTCALL(get_pid_task(struct pid *pid, + enum pid_type)); /* * attach_pid() and detach_pid() must be called with the tasklist_lock * write-held. */ -extern int FASTCALL(attach_pid(struct task_struct *task, enum pid_type type, int nr)); +extern int FASTCALL(attach_pid(struct task_struct *task, + enum pid_type type, int nr)); extern void FASTCALL(detach_pid(struct task_struct *task, enum pid_type)); /* * look up a PID in the hash table. Must be called with the tasklist_lock - * held. + * or rcu_read_lock() held. + */ +extern struct pid *FASTCALL(find_pid(int nr)); + +/* + * Lookup a PID in the hash table, and return with it's count elevated. */ -extern struct pid *FASTCALL(find_pid(enum pid_type, int)); +extern struct pid *find_get_pid(int nr); -extern int alloc_pidmap(void); -extern void FASTCALL(free_pidmap(int)); +extern struct pid *alloc_pid(void); +extern void FASTCALL(free_pid(struct pid *pid)); +#define pid_next(task, type) \ + ((task)->pids[(type)].node.next) + +#define pid_next_task(task, type) \ + hlist_entry(pid_next(task, type), struct task_struct, \ + pids[(type)].node) + + +/* We could use hlist_for_each_entry_rcu here but it takes more arguments + * than the do_each_task_pid/while_each_task_pid. So we roll our own + * to preserve the existing interface. + */ #define do_each_task_pid(who, type, task) \ if ((task = find_task_by_pid_type(type, who))) { \ - prefetch((task)->pids[type].pid_list.next); \ + prefetch(pid_next(task, type)); \ do { #define while_each_task_pid(who, type, task) \ - } while (task = pid_task((task)->pids[type].pid_list.next,\ - type), \ - prefetch((task)->pids[type].pid_list.next), \ - hlist_unhashed(&(task)->pids[type].pid_chain)); \ - } \ + } while (pid_next(task, type) && ({ \ + task = pid_next_task(task, type); \ + rcu_dereference(task); \ + prefetch(pid_next(task, type)); \ + 1; }) ); \ + } #endif /* _LINUX_PID_H */ diff --git a/include/linux/sched.h b/include/linux/sched.h index 7e0ff5dba986..541f4828f5e7 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -760,7 +760,7 @@ struct task_struct { struct task_struct *group_leader; /* threadgroup leader */ /* PID/PID hash table linkage. */ - struct pid pids[PIDTYPE_MAX]; + struct pid_link pids[PIDTYPE_MAX]; struct list_head thread_group; struct completion *vfork_done; /* for vfork() */ @@ -899,7 +899,7 @@ static inline pid_t process_group(struct task_struct *tsk) */ static inline int pid_alive(struct task_struct *p) { - return p->pids[PIDTYPE_PID].nr != 0; + return p->pids[PIDTYPE_PID].pid != NULL; } extern void free_task(struct task_struct *tsk); -- cgit v1.2.3 From 3e7e241f8c5c87cc3685364feface081c9fa3648 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 31 Mar 2006 02:31:43 -0800 Subject: [PATCH] dcache: Add helper d_hash_and_lookup It is very common to hash a dentry and then to call lookup. If we take fs specific hash functions into account the full hash logic can get ugly. Further full_name_hash as an inline function is almost 100 bytes on x86 so having a non-inline choice in some cases can measurably decrease code size. Signed-off-by: Eric W. Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/dcache.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/dcache.h b/include/linux/dcache.h index d10bd30c337e..836325ee0931 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -275,6 +275,7 @@ extern void d_move(struct dentry *, struct dentry *); /* appendix may either be NULL or be used for transname suffixes */ extern struct dentry * d_lookup(struct dentry *, struct qstr *); extern struct dentry * __d_lookup(struct dentry *, struct qstr *); +extern struct dentry * d_hash_and_lookup(struct dentry *, struct qstr *); /* validate "insecure" dentry pointer */ extern int d_validate(struct dentry *, struct dentry *); -- cgit v1.2.3 From 6ca017658b1f902c9bba2cc1017e301581f7728d Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Fri, 31 Mar 2006 02:31:49 -0800 Subject: [PATCH] backlight: Backlight Class Improvements Backlight class attributes are currently easy to implement incorrectly. Moving certain handling into the backlight core prevents this whilst at the same time makes the drivers simpler and consistent. The following changes are included: The brightness attribute only sets and reads the brightness variable in the backlight_properties structure. The power attribute only sets and reads the power variable in the backlight_properties structure. Any framebuffer blanking events change a variable fb_blank in the backlight_properties structure. The backlight driver has only two functions to implement. One function is called when any of the above properties change (to update the backlight brightness), the second is called to return the current backlight brightness value. A new attribute "actual_brightness" is added to return this brightness as determined by the driver having combined all the above factors (and any driver/device specific factors). Additionally, the backlight core takes care of checking the maximum brightness is not exceeded and of turning off the backlight before device removal. The corgi backlight driver is updated to reflect these changes. Signed-off-by: Richard Purdie Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/backlight.h | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) (limited to 'include') diff --git a/include/linux/backlight.h b/include/linux/backlight.h index bb9e54322322..75e91f5b6a04 100644 --- a/include/linux/backlight.h +++ b/include/linux/backlight.h @@ -19,20 +19,25 @@ struct fb_info; struct backlight_properties { /* Owner module */ struct module *owner; - /* Get the backlight power status (0: full on, 1..3: power saving - modes; 4: full off), see FB_BLANK_XXX */ - int (*get_power)(struct backlight_device *); - /* Enable or disable power to the LCD (0: on; 4: off, see FB_BLANK_XXX) */ - int (*set_power)(struct backlight_device *, int power); - /* Maximal value for brightness (read-only) */ - int max_brightness; - /* Get current backlight brightness */ + + /* Notify the backlight driver some property has changed */ + int (*update_status)(struct backlight_device *); + /* Return the current backlight brightness (accounting for power, + fb_blank etc.) */ int (*get_brightness)(struct backlight_device *); - /* Set backlight brightness (0..max_brightness) */ - int (*set_brightness)(struct backlight_device *, int brightness); /* Check if given framebuffer device is the one bound to this backlight; return 0 if not, !=0 if it is. If NULL, backlight always matches the fb. */ int (*check_fb)(struct fb_info *); + + /* Current User requested brightness (0 - max_brightness) */ + int brightness; + /* Maximal value for brightness (read-only) */ + int max_brightness; + /* Current FB Power mode (0: full on, 1..3: power saving + modes; 4: full off), see FB_BLANK_XXX */ + int power; + /* FB Blanking active? (values as for power) */ + int fb_blank; }; struct backlight_device { -- cgit v1.2.3 From 2c0f5fb08e8ad59f396b1bda41ccd93cbb00a09f Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Fri, 31 Mar 2006 02:31:51 -0800 Subject: [PATCH] backlight: corgi_bl: Generalise to support other Sharp SL hardware Generalise the Corgi backlight driver by moving the default intensity and limit mask settings into the platform specific data structure. This enables the driver to support other Zaurus hardware, specifically the SL-6000x (Tosa) model. Also change the spinlock to a mutex (the spinlock is overkill). Signed-off-by: Richard Purdie Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-arm/arch-pxa/sharpsl.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/asm-arm/arch-pxa/sharpsl.h b/include/asm-arm/arch-pxa/sharpsl.h index 0b43495d24b4..94cb4982af82 100644 --- a/include/asm-arm/arch-pxa/sharpsl.h +++ b/include/asm-arm/arch-pxa/sharpsl.h @@ -27,6 +27,8 @@ struct corgits_machinfo { */ struct corgibl_machinfo { int max_intensity; + int default_intensity; + int limit_mask; void (*set_bl_intensity)(int intensity); }; extern void corgibl_limit_intensity(int limit); -- cgit v1.2.3 From a536093a2f07007aa572e922752b7491b9ea8ff2 Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Fri, 31 Mar 2006 02:31:54 -0800 Subject: [PATCH] fbcon: Fix big-endian bogosity in slow_imageblit() The monochrome->color expansion routine that handles bitmaps which have (widths % 8) != 0 (slow_imageblit) produces corrupt characters in big-endian. This is caused by a bogus bit test in slow_imageblit(). Fix. This patch may deserve to go to the stable tree. The code has already been well tested in little-endian machines. It's only in big-endian where there is uncertainty and Herbert confirmed that this is the correct way to go. It should not introduce regressions. Signed-off-by: Antonino Daplas Acked-by: Herbert Poetzl Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/fb.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include') diff --git a/include/linux/fb.h b/include/linux/fb.h index d03fadfcafe3..315d89740ddf 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -839,12 +839,10 @@ struct fb_info { #define FB_LEFT_POS(bpp) (32 - bpp) #define FB_SHIFT_HIGH(val, bits) ((val) >> (bits)) #define FB_SHIFT_LOW(val, bits) ((val) << (bits)) -#define FB_BIT_NR(b) (7 - (b)) #else #define FB_LEFT_POS(bpp) (0) #define FB_SHIFT_HIGH(val, bits) ((val) << (bits)) #define FB_SHIFT_LOW(val, bits) ((val) >> (bits)) -#define FB_BIT_NR(b) (b) #endif /* -- cgit v1.2.3 From a244e1698ae3609cdfe24088e1293593cb7a5278 Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Fri, 31 Mar 2006 02:32:11 -0800 Subject: [PATCH] fs/namei.c: make lookup_hash() static As announced, lookup_hash() can now become static. Signed-off-by: Adrian Bunk Cc: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/namei.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/linux/namei.h b/include/linux/namei.h index e6698013e4d0..58cb3d3d44b4 100644 --- a/include/linux/namei.h +++ b/include/linux/namei.h @@ -75,7 +75,6 @@ extern struct file *nameidata_to_filp(struct nameidata *nd, int flags); extern void release_open_intent(struct nameidata *); extern struct dentry * lookup_one_len(const char *, struct dentry *, int); -extern __deprecated_for_modules struct dentry * lookup_hash(struct nameidata *); extern int follow_down(struct vfsmount **, struct dentry **); extern int follow_up(struct vfsmount **, struct dentry **); -- cgit v1.2.3 From e358c1a2c45f7ec32d77cc09a2bb42d6823a4193 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Fri, 31 Mar 2006 02:32:13 -0800 Subject: [PATCH] mutex: some cleanups Turn some macros into inline functions and add proper type checking as well as being more readable. Also a minor comment adjustment. Signed-off-by: Nicolas Pitre Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/mutex-dec.h | 30 ++++++++++++++++-------------- include/asm-generic/mutex-xchg.h | 33 +++++++++++++++++---------------- 2 files changed, 33 insertions(+), 30 deletions(-) (limited to 'include') diff --git a/include/asm-generic/mutex-dec.h b/include/asm-generic/mutex-dec.h index 40c6d1f86598..29c6ac34e236 100644 --- a/include/asm-generic/mutex-dec.h +++ b/include/asm-generic/mutex-dec.h @@ -17,13 +17,14 @@ * it wasn't 1 originally. This function MUST leave the value lower than * 1 even when the "1" assertion wasn't true. */ -#define __mutex_fastpath_lock(count, fail_fn) \ -do { \ - if (unlikely(atomic_dec_return(count) < 0)) \ - fail_fn(count); \ - else \ - smp_mb(); \ -} while (0) +static inline void +__mutex_fastpath_lock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *)) +{ + if (unlikely(atomic_dec_return(count) < 0)) + fail_fn(count); + else + smp_mb(); +} /** * __mutex_fastpath_lock_retval - try to take the lock by moving the count @@ -36,7 +37,7 @@ do { \ * or anything the slow path function returns. */ static inline int -__mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *)) +__mutex_fastpath_lock_retval(atomic_t *count, fastcall int (*fail_fn)(atomic_t *)) { if (unlikely(atomic_dec_return(count) < 0)) return fail_fn(count); @@ -59,12 +60,13 @@ __mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *)) * __mutex_slowpath_needs_to_unlock() macro needs to return 1, it needs * to return 0 otherwise. */ -#define __mutex_fastpath_unlock(count, fail_fn) \ -do { \ - smp_mb(); \ - if (unlikely(atomic_inc_return(count) <= 0)) \ - fail_fn(count); \ -} while (0) +static inline void +__mutex_fastpath_unlock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *)) +{ + smp_mb(); + if (unlikely(atomic_inc_return(count) <= 0)) + fail_fn(count); +} #define __mutex_slowpath_needs_to_unlock() 1 diff --git a/include/asm-generic/mutex-xchg.h b/include/asm-generic/mutex-xchg.h index 1d24f47e6c48..32a2100c1aeb 100644 --- a/include/asm-generic/mutex-xchg.h +++ b/include/asm-generic/mutex-xchg.h @@ -3,7 +3,7 @@ * * Generic implementation of the mutex fastpath, based on xchg(). * - * NOTE: An xchg based implementation is less optimal than an atomic + * NOTE: An xchg based implementation might be less optimal than an atomic * decrement/increment based implementation. If your architecture * has a reasonable atomic dec/inc then you should probably use * asm-generic/mutex-dec.h instead, or you could open-code an @@ -22,14 +22,14 @@ * wasn't 1 originally. This function MUST leave the value lower than 1 * even when the "1" assertion wasn't true. */ -#define __mutex_fastpath_lock(count, fail_fn) \ -do { \ - if (unlikely(atomic_xchg(count, 0) != 1)) \ - fail_fn(count); \ - else \ - smp_mb(); \ -} while (0) - +static inline void +__mutex_fastpath_lock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *)) +{ + if (unlikely(atomic_xchg(count, 0) != 1)) + fail_fn(count); + else + smp_mb(); +} /** * __mutex_fastpath_lock_retval - try to take the lock by moving the count @@ -42,7 +42,7 @@ do { \ * or anything the slow path function returns */ static inline int -__mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *)) +__mutex_fastpath_lock_retval(atomic_t *count, fastcall int (*fail_fn)(atomic_t *)) { if (unlikely(atomic_xchg(count, 0) != 1)) return fail_fn(count); @@ -64,12 +64,13 @@ __mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *)) * __mutex_slowpath_needs_to_unlock() macro needs to return 1, it needs * to return 0 otherwise. */ -#define __mutex_fastpath_unlock(count, fail_fn) \ -do { \ - smp_mb(); \ - if (unlikely(atomic_xchg(count, 1) != 0)) \ - fail_fn(count); \ -} while (0) +static inline void +__mutex_fastpath_unlock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *)) +{ + smp_mb(); + if (unlikely(atomic_xchg(count, 1) != 0)) + fail_fn(count); +} #define __mutex_slowpath_needs_to_unlock() 0 -- cgit v1.2.3 From e1211e3fa7fd05ff0d4f597fd37e40de8acc6784 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sat, 1 Apr 2006 01:38:18 +0900 Subject: [PATCH] libata: implement ata_dev_enabled and disabled() This patch renames ata_dev_present() to ata_dev_enabled() and adds ata_dev_disabled(). This is to discern the state where a device is present but disabled from not-present state. This disctinction is necessary when configuring transfer mode because device selection timing must not be violated even if a device fails to configure. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- include/linux/libata.h | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/libata.h b/include/linux/libata.h index 0d61357604d5..c6883ba8cba9 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -672,14 +672,24 @@ static inline unsigned int ata_tag_valid(unsigned int tag) return (tag < ATA_MAX_QUEUE) ? 1 : 0; } -static inline unsigned int ata_class_present(unsigned int class) +static inline unsigned int ata_class_enabled(unsigned int class) { return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; } -static inline unsigned int ata_dev_present(const struct ata_device *dev) +static inline unsigned int ata_class_disabled(unsigned int class) { - return ata_class_present(dev->class); + return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; +} + +static inline unsigned int ata_dev_enabled(const struct ata_device *dev) +{ + return ata_class_enabled(dev->class); +} + +static inline unsigned int ata_dev_disabled(const struct ata_device *dev) +{ + return ata_class_disabled(dev->class); } static inline u8 ata_chk_status(struct ata_port *ap) -- cgit v1.2.3