| Commit message (Collapse) | Author | Age |
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Define a struct that describes common fields used in all slab allocators.
A slab allocator either uses the common definition (like SLOB) or is
required to provide members of kmem_cache with the definition given.
After that it will be possible to share code that
only operates on those fields of kmem_cache.
The patch basically takes the slob definition of kmem cache and
uses the field namees for the other allocators.
It also standardizes the names used for basic object lengths in
allocators:
object_size Struct size specified at kmem_cache_create. Basically
the payload expected to be used by the subsystem.
size The size of memory allocator for each object. This size
is larger than object_size and includes padding, alignment
and extra metadata for each object (f.e. for debugging
and rcu).
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Add fields to the page struct so that it is properly documented that
slab overlays the lru fields.
This cleans up some casts in slab.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Define the fields used by slob in mm_types.h and use struct page instead
of struct slob_page in slob. This cleans up numerous of typecasts in slob.c and
makes readers aware of slob's use of page struct fields.
[Also cleans up some bitrot in slob.c. The page struct field layout
in slob.c is an old layout and does not match the one in mm_types.h]
Reviewed-by: Glauber Costa <glommer@parallels.com>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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* Fix a merge conflict in mm/slub.c::acquire_slab() due to commit 02d7633
("slub: fix a memory leak in get_partial_node()").
Conflicts:
mm/slub.c
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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The node field is always page_to_nid(c->page). So its rather easy to
replace. Note that there maybe slightly more overhead in various hot paths
due to the need to shift the bits from page->flags. However, that is mostly
compensated for by a smaller footprint of the kmem_cache_cpu structure (this
patch reduces that to 3 words per cache) which allows better caching.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem bugfixes from James Morris.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
selinux: fix selinux_inode_setxattr oops
KEYS: linux/key-type.h needs linux/errno.h
smack: off by one error
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linux/key-type.h needs to #include linux/errno.h as it refers to ENOKEY.
Without this, with sparc's allmodconfig in one of my test trees, the following
error occurs:
include/linux/key-type.h: In function 'key_negate_and_link':
include/linux/key-type.h:122:43: error: 'ENOKEY' undeclared (first use in this function)
include/linux/key-type.h:122:43: note: each undeclared identifier is reported only once for each fun
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm
Pull device-mapper updates from Alasdair G Kergon:
- Flip the thin target into new read-only or failed modes if errors
are detected;
- Handle chunk sizes that are not powers of two in the snapshot and
thin targets;
- Provide a way for userspace to avoid replacing an already-loaded
multipath hardware handler while booting;
- Reduce dm_thin_endio_hook slab size to avoid allocation failures;
- Numerous small changes and cleanups to the code.
* tag 'dm-3.6-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm: (63 commits)
dm thin: commit before gathering status
dm thin: add read only and fail io modes
dm thin metadata: introduce dm_pool_abort_metadata
dm thin metadata: introduce dm_pool_metadata_set_read_only
dm persistent data: introduce dm_bm_set_read_only
dm thin: reduce number of metadata commits
dm thin metadata: add dm_thin_changed_this_transaction
dm thin metadata: add format option to dm_pool_metadata_open
dm thin metadata: tidy up open and format error paths
dm thin metadata: only check incompat features on open
dm thin metadata: remove duplicate pmd initialisation
dm thin metadata: remove create parameter from __create_persistent_data_objects
dm thin metadata: move __superblock_all_zeroes to __open_or_format_metadata
dm thin metadata: remove nr_blocks arg from __create_persistent_data_objects
dm thin metadata: split __open or format metadata
dm thin metadata: use struct dm_pool_metadata members in __open_or_format_metadata
dm thin metadata: zero unused superblock uuid
dm thin metadata: lift __begin_transaction out of __write_initial_superblock
dm thin metadata: move dm_commit_pool_metadata into __write_initial_superblock
dm thin metadata: factor out __write_initial_superblock
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Commit outstanding metadata before returning the status for a dm thin
pool so that the numbers reported are as up-to-date as possible.
The commit is not performed if the device is suspended or if
the DM_NOFLUSH_FLAG is supplied by userspace and passed to the target
through a new 'status_flags' parameter in the target's dm_status_fn.
The userspace dmsetup tool will support the --noflush flag with the
'dmsetup status' and 'dmsetup wait' commands from version 1.02.76
onwards.
Tested-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Use boolean bit fields for flags in struct dm_target.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Allow targets to override the 'supports flush' calculation.
Set 'flush_supported' if a target needs to receive flushes regardless of
whether or not its underlying devices have support.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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This patch introduces a new variable split_discard_requests. It can be
set by targets so that discard requests are split on max_io_len
boundaries.
When split_discard_requests is not set, discard requests are only split on
boundaries between targets, as was the case before this patch.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Remove the restriction that limits a target's specified maximum incoming
I/O size to be a power of 2.
Rename this setting from 'split_io' to the less-ambiguous 'max_io_len'.
Change it from sector_t to uint32_t, which is plenty big enough, and
introduce a wrapper function dm_set_target_max_io_len() to set it.
Use sector_div() to process it now that it is not necessarily a power of 2.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Remove unused dm_flush_fn .flush target method from header.
This was left-over from the FLUSH/FUA conversion and is no longer used.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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git://git.linaro.org/people/mszyprowski/linux-dma-mapping
Pull DMA-mapping updates from Marek Szyprowski:
"Those patches are continuation of my earlier work.
They contains extensions to DMA-mapping framework to remove limitation
of the current ARM implementation (like limited total size of DMA
coherent/write combine buffers), improve performance of buffer sharing
between devices (attributes to skip cpu cache operations or creation
of additional kernel mapping for some specific use cases) as well as
some unification of the common code for dma_mmap_attrs() and
dma_mmap_coherent() functions. All extensions have been implemented
and tested for ARM architecture."
* 'for-linus-for-3.6-rc1' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
ARM: dma-mapping: add support for DMA_ATTR_SKIP_CPU_SYNC attribute
common: DMA-mapping: add DMA_ATTR_SKIP_CPU_SYNC attribute
ARM: dma-mapping: add support for dma_get_sgtable()
common: dma-mapping: introduce dma_get_sgtable() function
ARM: dma-mapping: add support for DMA_ATTR_NO_KERNEL_MAPPING attribute
common: DMA-mapping: add DMA_ATTR_NO_KERNEL_MAPPING attribute
common: dma-mapping: add support for generic dma_mmap_* calls
ARM: dma-mapping: fix error path for memory allocation failure
ARM: dma-mapping: add more sanity checks in arm_dma_mmap()
ARM: dma-mapping: remove custom consistent dma region
mm: vmalloc: use const void * for caller argument
scatterlist: add sg_alloc_table_from_pages function
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This patch adds DMA_ATTR_SKIP_CPU_SYNC attribute to the DMA-mapping
subsystem.
By default dma_map_{single,page,sg} functions family transfer a given
buffer from CPU domain to device domain. Some advanced use cases might
require sharing a buffer between more than one device. This requires
having a mapping created separately for each device and is usually
performed by calling dma_map_{single,page,sg} function more than once
for the given buffer with device pointer to each device taking part in
the buffer sharing. The first call transfers a buffer from 'CPU' domain
to 'device' domain, what synchronizes CPU caches for the given region
(usually it means that the cache has been flushed or invalidated
depending on the dma direction). However, next calls to
dma_map_{single,page,sg}() for other devices will perform exactly the
same sychronization operation on the CPU cache. CPU cache sychronization
might be a time consuming operation, especially if the buffers are
large, so it is highly recommended to avoid it if possible.
DMA_ATTR_SKIP_CPU_SYNC allows platform code to skip synchronization of
the CPU cache for the given buffer assuming that it has been already
transferred to 'device' domain. This attribute can be also used for
dma_unmap_{single,page,sg} functions family to force buffer to stay in
device domain after releasing a mapping for it. Use this attribute with
care!
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
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This patch adds dma_get_sgtable() function which is required to let
drivers to share the buffers allocated by DMA-mapping subsystem. Right
now the driver gets a dma address of the allocated buffer and the kernel
virtual mapping for it. If it wants to share it with other device (= map
into its dma address space) it usually hacks around kernel virtual
addresses to get pointers to pages or assumes that both devices share
the DMA address space. Both solutions are just hacks for the special
cases, which should be avoided in the final version of buffer sharing.
To solve this issue in a generic way, a new call to DMA mapping has been
introduced - dma_get_sgtable(). It allocates a scatter-list which
describes the allocated buffer and lets the driver(s) to use it with
other device(s) by calling dma_map_sg() on it.
This patch provides a generic implementation based on virt_to_page()
call. Architectures which require more sophisticated translation might
provide their own get_sgtable() methods.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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This patch adds DMA_ATTR_NO_KERNEL_MAPPING attribute which lets the
platform to avoid creating a kernel virtual mapping for the allocated
buffer. On some architectures creating such mapping is non-trivial task
and consumes very limited resources (like kernel virtual address space
or dma consistent address space). Buffers allocated with this attribute
can be only passed to user space by calling dma_mmap_attrs().
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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This patch changes dma-mapping subsystem to use generic vmalloc areas
for all consistent dma allocations. This increases the total size limit
of the consistent allocations and removes platform hacks and a lot of
duplicated code.
Atomic allocations are served from special pool preallocated on boot,
because vmalloc areas cannot be reliably created in atomic context.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
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'const void *' is a safer type for caller function type. This patch
updates all references to caller function type.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
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This patch adds a new constructor for an sg table. The table is constructed
from an array of struct pages. All contiguous chunks of the pages are merged
into a single sg nodes. A user may provide an offset and a size of a buffer if
the buffer is not page-aligned.
The function is dedicated for DMABUF exporters which often perform conversion
from an page array to a scatterlist. Moreover the scatterlist should be
squashed in order to save memory and to speed-up the process of DMA mapping
using dma_map_sg.
The code is based on the patch 'v4l: vb2-dma-contig: add support for
scatterlist in userptr mode' and hints from Laurent Pinchart.
Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
CC: Andrew Morton <akpm@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
"A new driver for FT5x06 based EDT displays and a couple of other
driver changes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: synaptics - handle out of bounds values from the hardware
Input: wacom - add support to Cintiq 22HD
Input: add driver for FT5x06 based EDT displays
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This is a driver for the EDT "Polytouch" family of touch controllers
based on the FocalTech FT5x06 line of chips.
Signed-off-by: Simon Budig <simon.budig@kernelconcepts.de>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Pull EDAC patches from Mauro Carvalho Chehab:
- the second part of the EDAC rework:
- Add the sysfs nodes that exports the real memory layout, instead
of the fake one (needed to properly represent Intel memory
controllers since 2002)
- convert EDAC MC to use "struct device" instead of creating the
sysfs nodes via the kobj API
- adds a tracepoint to represent memory errors
- some cleanup patches
- some fixes at i5000, i5400 and EDAC core
- a new EDAC driver for Caldera.
* git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac: (33 commits)
edac i5000, i5400: fix pointer math in i5000_get_mc_regs()
edac: allow specifying the error count with fake_inject
edac: add support for Calxeda highbank L2 cache ecc
edac: add support for Calxeda highbank memory controller
edac: create top-level debugfs directory
sb_edac: properly handle error count
i7core_edac: properly handle error count
edac: edac_mc_handle_error(): add an error_count parameter
edac: remove arch-specific parameter for the error handler
amd64_edac: Don't pass driver name as an error parameter
edac_mc: check for allocation failure in edac_mc_alloc()
edac: Increase version to 3.0.0
edac_mc: Cleanup per-dimm_info debug messages
edac: Convert debugfX to edac_dbg(X,
edac: Use more normal debugging macro style
edac: Don't add __func__ or __FILE__ for debugf[0-9] msgs
Edac: Add ABI Documentation for the new device nodes
edac: move documentation ABI to ABI/testing/sysfs-devices-edac
i7core_edac: change the mem allocation scheme to make Documentation/kobject.txt happy
edac: change the mem allocation scheme to make Documentation/kobject.txt happy
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* devel: (33 commits)
edac i5000, i5400: fix pointer math in i5000_get_mc_regs()
edac: allow specifying the error count with fake_inject
edac: add support for Calxeda highbank L2 cache ecc
edac: add support for Calxeda highbank memory controller
edac: create top-level debugfs directory
sb_edac: properly handle error count
i7core_edac: properly handle error count
edac: edac_mc_handle_error(): add an error_count parameter
edac: remove arch-specific parameter for the error handler
amd64_edac: Don't pass driver name as an error parameter
edac_mc: check for allocation failure in edac_mc_alloc()
edac: Increase version to 3.0.0
edac_mc: Cleanup per-dimm_info debug messages
edac: Convert debugfX to edac_dbg(X,
edac: Use more normal debugging macro style
edac: Don't add __func__ or __FILE__ for debugf[0-9] msgs
Edac: Add ABI Documentation for the new device nodes
edac: move documentation ABI to ABI/testing/sysfs-devices-edac
i7core_edac: change the mem allocation scheme to make Documentation/kobject.txt happy
edac: change the mem allocation scheme to make Documentation/kobject.txt happy
...
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In order to test if the error counters are properly incremented,
add a way to specify how many errors were generated by a trace.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Kernel kobjects have rigid rules: each container object should be
dynamically allocated, and can't be allocated into a single kmalloc.
EDAC never obeyed this rule: it has a single malloc function that
allocates all needed data into a single kzalloc.
As this is not accepted anymore, change the allocation schema of the
EDAC *_info structs to enforce this Kernel standard.
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Greg K H <gregkh@linuxfoundation.org>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Sometimes, it is useful to have a mechanism that generates fake
errors, in order to test the EDAC core code, and the userspace
tools.
Provide such mechanism by adding a few debugfs nodes.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Now that al users for the old kobj raw access are gone,
we can get rid of the legacy kobj-based structures and
data.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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The EDAC subsystem uses the old struct sysdev approach,
creating all nodes using the raw sysfs API. This is bad,
as the API is deprecated.
As we'll be changing the EDAC API, let's first port the existing
code to struct device.
There's one drawback on this patch: driver-specific sysfs
nodes, used by mpc85xx_edac, amd64_edac and i7core_edac
won't be created anymore. While it would be possible to
also port the device-specific code, that would mix kobj with
struct device, with is not recommended. Also, it is easier and nicer
to move the code to the drivers, instead, as the core can get rid
of some complex logic that just emulates what the device_add()
and device_create_file() already does.
The next patches will convert the driver-specific code to use
the device-specific calls. Then, the remaining bits of the old
sysfs API will be removed.
NOTE: a per-MC bus is required, otherwise devices with more than
one memory controller will hit a bug like the one below:
[ 819.094946] EDAC DEBUG: find_mci_by_dev: find_mci_by_dev()
[ 819.094948] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device() idx=1
[ 819.094952] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device(): creating device mc1
[ 819.094967] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device creating dimm0, located at channel 0 slot 0
[ 819.094984] ------------[ cut here ]------------
[ 819.100142] WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0xc1/0xf0()
[ 819.107282] Hardware name: S2600CP
[ 819.111078] sysfs: cannot create duplicate filename '/bus/edac/devices/dimm0'
[ 819.119062] Modules linked in: sb_edac(+) edac_core ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables bridge stp llc sunrpc binfmt_misc dm_mirror dm_region_hash dm_log vhost_net macvtap macvlan tun kvm microcode pcspkr iTCO_wdt iTCO_vendor_support igb i2c_i801 i2c_core sg ioatdma dca sr_mod cdrom sd_mod crc_t10dif ahci libahci isci libsas libata scsi_transport_sas scsi_mod wmi dm_mod [last unloaded: scsi_wait_scan]
[ 819.175748] Pid: 10902, comm: modprobe Not tainted 3.3.0-0.11.el7.v12.2.x86_64 #1
[ 819.184113] Call Trace:
[ 819.186868] [<ffffffff8105adaf>] warn_slowpath_common+0x7f/0xc0
[ 819.193573] [<ffffffff8105aea6>] warn_slowpath_fmt+0x46/0x50
[ 819.200000] [<ffffffff811f53d1>] sysfs_add_one+0xc1/0xf0
[ 819.206025] [<ffffffff811f5cf5>] sysfs_do_create_link+0x135/0x220
[ 819.212944] [<ffffffff811f7023>] ? sysfs_create_group+0x13/0x20
[ 819.219656] [<ffffffff811f5df3>] sysfs_create_link+0x13/0x20
[ 819.226109] [<ffffffff813b04f6>] bus_add_device+0xe6/0x1b0
[ 819.232350] [<ffffffff813ae7cb>] device_add+0x2db/0x460
[ 819.238300] [<ffffffffa0325634>] edac_create_dimm_object+0x84/0xf0 [edac_core]
[ 819.246460] [<ffffffffa0325e18>] edac_create_sysfs_mci_device+0xe8/0x290 [edac_core]
[ 819.255215] [<ffffffffa0322e2a>] edac_mc_add_mc+0x5a/0x2c0 [edac_core]
[ 819.262611] [<ffffffffa03412df>] sbridge_register_mci+0x1bc/0x279 [sb_edac]
[ 819.270493] [<ffffffffa03417a3>] sbridge_probe+0xef/0x175 [sb_edac]
[ 819.277630] [<ffffffff813ba4e8>] ? pm_runtime_enable+0x58/0x90
[ 819.284268] [<ffffffff812f430c>] local_pci_probe+0x5c/0xd0
[ 819.290508] [<ffffffff812f5ba1>] __pci_device_probe+0xf1/0x100
[ 819.297117] [<ffffffff812f5bea>] pci_device_probe+0x3a/0x60
[ 819.303457] [<ffffffff813b1003>] really_probe+0x73/0x270
[ 819.309496] [<ffffffff813b138e>] driver_probe_device+0x4e/0xb0
[ 819.316104] [<ffffffff813b149b>] __driver_attach+0xab/0xb0
[ 819.322337] [<ffffffff813b13f0>] ? driver_probe_device+0xb0/0xb0
[ 819.329151] [<ffffffff813af5d6>] bus_for_each_dev+0x56/0x90
[ 819.335489] [<ffffffff813b0d7e>] driver_attach+0x1e/0x20
[ 819.341534] [<ffffffff813b0980>] bus_add_driver+0x1b0/0x2a0
[ 819.347884] [<ffffffffa0347000>] ? 0xffffffffa0346fff
[ 819.353641] [<ffffffff813b19f6>] driver_register+0x76/0x140
[ 819.359980] [<ffffffff8159f18b>] ? printk+0x51/0x53
[ 819.365524] [<ffffffffa0347000>] ? 0xffffffffa0346fff
[ 819.371291] [<ffffffff812f5896>] __pci_register_driver+0x56/0xd0
[ 819.378096] [<ffffffffa0347054>] sbridge_init+0x54/0x1000 [sb_edac]
[ 819.385231] [<ffffffff8100203f>] do_one_initcall+0x3f/0x170
[ 819.391577] [<ffffffff810bcd2e>] sys_init_module+0xbe/0x230
[ 819.397926] [<ffffffff815bb529>] system_call_fastpath+0x16/0x1b
[ 819.404633] ---[ end trace 1654fdd39556689f ]---
This happens because the bus is not being properly initialized.
Instead of putting the memory sub-devices inside the memory controller,
it is putting everything under the same directory:
$ tree /sys/bus/edac/
/sys/bus/edac/
├── devices
│ ├── all_channel_counts -> ../../../devices/system/edac/mc/mc0/all_channel_counts
│ ├── csrow0 -> ../../../devices/system/edac/mc/mc0/csrow0
│ ├── csrow1 -> ../../../devices/system/edac/mc/mc0/csrow1
│ ├── csrow2 -> ../../../devices/system/edac/mc/mc0/csrow2
│ ├── dimm0 -> ../../../devices/system/edac/mc/mc0/dimm0
│ ├── dimm1 -> ../../../devices/system/edac/mc/mc0/dimm1
│ ├── dimm3 -> ../../../devices/system/edac/mc/mc0/dimm3
│ ├── dimm6 -> ../../../devices/system/edac/mc/mc0/dimm6
│ ├── inject_addrmatch -> ../../../devices/system/edac/mc/mc0/inject_addrmatch
│ ├── mc -> ../../../devices/system/edac/mc
│ └── mc0 -> ../../../devices/system/edac/mc/mc0
├── drivers
├── drivers_autoprobe
├── drivers_probe
└── uevent
On a multi-memory controller system, the names "csrow%d" and "dimm%d"
should be under "mc%d", and not at the main hierarchy level.
So, we need to create a per-MC bus, in order to have its own namespace.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Greg K H <gregkh@linuxfoundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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No functional changes. Just comment improvements.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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As EDAC doesn't use struct device itself, it created a parent dev
pointer called as "pdev". Now that we'll be converting it to use
struct device, instead of struct devsys, this needs to be fixed.
No functional changes.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Jason Uhlenkott <juhlenko@akamai.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Joe Perches <joe@perches.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: Josh Boyer <jwboyer@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire updates from Stefan Richter:
- Small fixes and optimizations.
- A new sysfs attribute to tell local and remote nodes apart.
Useful to set special permissions/ ownership of local nodes'
/dev/fw*, to start daemons on them (for diagnostics, management,
AV targets, VersaPHY initiator or targets...), to pick up their
GUID to use it as GUID of an SBP2 target instance, and of course
for informational purposes.
* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: core: document is_local sysfs attribute
firewire: core: add is_local sysfs device attribute
firewire: ohci: initialize multiChanMode bits after reset
firewire: core: fix multichannel IR with buffers larger than 2 GB
firewire: ohci: sanity-check MMIO resource
firewire: ohci: lazy bus time initialization
firewire: core: allocate the low memory region
firewire: core: make address handler length 64 bits
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Making this information available in sysfs allows to differentiate
between controllers in the local and remote Linux PCs, and thus is
useful for servers that are started with udev rules.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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The type of the length field of the fw_address_handler structure was
size_t, which restricted it to 32 bits on 32-bit architectures.
While making it u32 would match the userspace API, all calculations on
this field use 64 bits anyway, and the ability to use 4 GB or larger
address ranges is useful in the kernel.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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Pull PWM subsystem from Thierry Reding:
"The new PWM subsystem aims at collecting all implementations of the
legacy PWM API and to eventually replace it completely.
The subsystem has been in development for over half a year now and
many drivers have already been converted. It has been in linux-next
for a couple of weeks and there have been no major issues so I think
it is ready for inclusion in your tree."
Arnd Bergmann <arnd@arndb.de>:
"Very much Ack on the new subsystem. It uses the interface
declarations as the previously separate pwm drivers, so nothing
changes for now in the drivers using it, although it enables us to
change those more easily in the future if we want to.
This work is also one of the missing pieces that are required to
eventually build ARM kernels for multiple platforms, which is
currently prohibited (amongs other things) by the fact that you cannot
have more than one driver exporting the pwm functions."
Tested-and-acked-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Philip, Avinash <avinashphilip@ti.com> # TI's AM33xx platforms
Acked-By: Alexandre Pereira da Silva <aletes.xgr@gmail.com> # LPC32XX
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sachin Kamat <sachin.kamat@linaro.org>
Fix up trivial conflicts with other cleanups and DT updates.
* 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm: (36 commits)
pwm: pwm-tiehrpwm: PWM driver support for EHRPWM
pwm: pwm-tiecap: PWM driver support for ECAP APWM
pwm: fix used-uninitialized warning in pwm_get()
pwm: add lpc32xx PWM support
pwm_backlight: pass correct brightness to callback
pwm: Use pr_* functions in pwm-samsung.c file
pwm: Convert pwm-samsung to use devm_* APIs
pwm: Convert pwm-tegra to use devm_clk_get()
pwm: pwm-mxs: Return proper error if pwmchip_remove() fails
pwm: pwm-bfin: Return proper error if pwmchip_remove() fails
pwm: pxa: Propagate pwmchip_remove() error
pwm: Convert pwm-pxa to use devm_* APIs
pwm: Convert pwm-vt8500 to use devm_* APIs
pwm: Convert pwm-imx to use devm_* APIs
pwm: Conflict with legacy PWM API
pwm: pwm-mxs: add pinctrl support
pwm: pwm-mxs: use devm_* managed functions
pwm: pwm-mxs: use global reset function stmp_reset_block
pwm: pwm-mxs: encode soc name in compatible string
pwm: Take over maintainership of the PWM subsystem
...
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This commit adds very basic support for device tree probing. Currently,
only a PWM and a list of distinct brightness levels can be specified.
Enabling or disabling backlight power via GPIOs is not yet supported.
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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This patch adds helpers to support device tree bindings for the generic
PWM API. Device tree binding documentation for PWM controllers is also
provided.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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This commit adds an empty of_parse_phandle_with_args() function for
!CONFIG_OF builds.
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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This commit adds an empty of_property_match_string() function for
!CONFIG_OF builds.
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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In order to get rid of the global namespace for PWM devices, this commit
provides an alternative method, similar to that of the regulator or
clock frameworks, for registering a static mapping for PWM devices. This
works by providing a table with a provider/consumer map in the board
setup code.
With the new pwm_get() and pwm_put() functions available, usage of
pwm_request() and pwm_free() becomes deprecated.
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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This commit adds a debugfs interface that can be used to list the
current internal state of the PWM devices registered with the PWM
framework.
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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Many PWM controllers provide access to more than a single PWM output and
may even share some resource among them. Allowing a PWM chip to provide
multiple PWM devices enables better sharing of those resources. As a
side-effect this change allows easy integration with the device tree
where a given PWM can be looked up based on the PWM chip's phandle and a
corresponding index.
This commit modifies the PWM core to support multiple PWMs per struct
pwm_chip. It achieves this in a similar way to how gpiolib works, by
allowing PWM ranges to be requested dynamically (pwm_chip.base == -1) or
starting at a given offset (pwm_chip.base >= 0). A chip specifies how
many PWMs it controls using the npwm member. Each of the functions in
the pwm_ops structure gets an additional argument that specified the PWM
number (it can be converted to a per-chip index by subtracting the
chip's base).
The total maximum number of PWM devices is currently fixed to 1024 while
the data is actually stored in a radix tree, thus saving resources if
not all of them are used.
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
[eric@eukrea.com: fix error handling in pwmchip_add]
Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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This patch adds framework support for PWM (pulse width modulation) devices.
The is a barebone PWM API already in the kernel under include/linux/pwm.h,
but it does not allow for multiple drivers as each of them implements the
pwm_*() functions.
There are other PWM framework patches around from Bill Gatliff. Unlike
his framework this one does not change the existing API for PWMs so that
this framework can act as a drop in replacement for the existing API.
Why another framework?
Several people argue that there should not be another framework for PWMs
but they should be integrated into one of the existing frameworks like led
or hwmon. Unlike these frameworks the PWM framework is agnostic to the
purpose of the PWM. In fact, a PWM can drive a LED, but this makes the
LED framework a user of a PWM, like already done in leds-pwm.c. The gpio
framework also is not suitable for PWMs. Every gpio could be turned into
a PWM using timer based toggling, but on the other hand not every PWM hardware
device can be turned into a gpio due to the lack of hardware capabilities.
This patch does not try to improve the PWM API yet, this could be done in
subsequent patches.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
[thierry.reding@avionic-design.de: fixup typos, kerneldoc comments]
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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Pull embedded i2c changes from Wolfram Sang:
"Changes for the "embedded" part of the I2C subsystem:
- lots of devicetree conversions of drivers (and preparations for
that)
- big cleanups for drivers for OMAP, Tegra, Nomadik, Blackfin
- Rafael's struct dev_pm_ops conversion patches for I2C
- usual driver cleanups and fixes
All patches have been in linux-next for an apropriate time and all
patches touching files outside of i2c-folders should have proper acks
from the maintainers."
* 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux: (60 commits)
Revert "i2c: tegra: convert normal suspend/resume to *_noirq"
I2C: MV64XYZ: Add Device Tree support
i2c: stu300: use devm managed resources
i2c: i2c-ocores: support for 16bit and 32bit IO
V4L/DVB: mfd: use reg_shift instead of regstep
i2c: i2c-ocores: Use reg-shift property
i2c: i2c-ocores: DT bindings and minor fixes.
i2c: mv64xxxx: remove EXPERIMENTAL tag
i2c-s3c2410: Use plain pm_runtime_put()
i2c: s3c2410: Fix pointer type passed to of_match_node()
i2c: mxs: Set I2C timing registers for mxs-i2c
i2c: i2c-bfin-twi: Move blackfin TWI register access Macro to head file.
i2c: i2c-bfin-twi: Move TWI peripheral pin request array to platform data.
i2c:i2c-bfin-twi: include twi head file
i2c:i2c-bfin-twi: TWI fails to restart next transfer in high system load.
i2c: i2c-bfin-twi: Tighten condition when failing I2C transfer if MEN bit is reset unexpectedly.
i2c: i2c-bfin-twi: Break dead waiting loop if i2c device misbehaves.
i2c: i2c-bfin-twi: Improve the patch for bug "Illegal i2c bus lock upon certain transfer scenarios".
i2c: i2c-bfin-twi: Illegal i2c bus lock upon certain transfer scenarios.
i2c-mv64xxxx: allow more than one driver instance
...
Conflicts:
drivers/i2c/busses/i2c-nomadik.c
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Some architectures supports only 16-bit or 32-bit read/write access to
their IO space. Add a 'reg-io-width' platform and OF parameter which
specifies the IO width to support these platforms.
reg-io-width can be specified as 1, 2 or 4, and has a default value
of 1 if it is unspecified.
Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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Deprecate 'regstep' property and use the standard 'reg-shift' property
for register offset shifts. 'regstep' will still be supported as an
optional property, but will give a warning when used.
Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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The header and driver are only used by arm/mach-u8500 (and potentially
arm/mach-nomadik), but the STA2X11 I/O Hub exports on PCIe a number of
devices, including i2c-nomadik. This patch allows compilation of the
driver under x86.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
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Pull ARM updates from Russell King:
"First ARM push of this merge window, post me coming back from holiday.
This is what has been in linux-next for the last few weeks. Not much
to say which isn't described by the commit summaries."
* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (32 commits)
ARM: 7463/1: topology: Update cpu_power according to DT information
ARM: 7462/1: topology: factorize the update of sibling masks
ARM: 7461/1: topology: Add arch_scale_freq_power function
ARM: 7456/1: ptrace: provide separate functions for tracing syscall {entry,exit}
ARM: 7455/1: audit: move syscall auditing until after ptrace SIGTRAP handling
ARM: 7454/1: entry: don't bother with syscall tracing on ret_from_fork path
ARM: 7453/1: audit: only allow syscall auditing for pure EABI userspace
ARM: 7452/1: delay: allow timer-based delay implementation to be selected
ARM: 7451/1: arch timer: implement read_current_timer and get_cycles
ARM: 7450/1: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs
ARM: 7449/1: use generic strnlen_user and strncpy_from_user functions
ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration
ARM: 7447/1: rwlocks: remove unused branch labels from trylock routines
ARM: 7446/1: spinlock: use ticket algorithm for ARMv6+ locking implementation
ARM: 7445/1: mm: update CONTEXTIDR register to contain PID of current process
ARM: 7444/1: kernel: add arch-timer C3STOP feature
ARM: 7460/1: remove asm/locks.h
ARM: 7439/1: head.S: simplify initial page table mapping
ARM: 7437/1: zImage: Allow DTB command line concatenation with ATAG_CMDLINE
ARM: 7436/1: Do not map the vectors page as write-through on UP systems
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