Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 24 insertions, 106 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 992060e09897..9d0a9795a0f8 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -206,9 +206,6 @@ int __init arch_early_irq_init(void)
 	count = ARRAY_SIZE(irq_cfgx);
 	node = cpu_to_node(0);
 
-	/* Make sure the legacy interrupts are marked in the bitmap */
-	irq_reserve_irqs(0, legacy_pic->nr_legacy_irqs);
-
 	for (i = 0; i < count; i++) {
 		irq_set_chip_data(i, &cfg[i]);
 		zalloc_cpumask_var_node(&cfg[i].domain, GFP_KERNEL, node);
@@ -281,18 +278,6 @@ static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node)
 	return cfg;
 }
 
-static int alloc_irqs_from(unsigned int from, unsigned int count, int node)
-{
-	return irq_alloc_descs_from(from, count, node);
-}
-
-static void free_irq_at(unsigned int at, struct irq_cfg *cfg)
-{
-	free_irq_cfg(at, cfg);
-	irq_free_desc(at);
-}
-
-
 struct io_apic {
 	unsigned int index;
 	unsigned int unused[3];
@@ -2916,98 +2901,39 @@ static int __init ioapic_init_ops(void)
 device_initcall(ioapic_init_ops);
 
 /*
- * Dynamic irq allocate and deallocation
+ * Dynamic irq allocate and deallocation. Should be replaced by irq domains!
  */
-unsigned int __create_irqs(unsigned int from, unsigned int count, int node)
+int arch_setup_hwirq(unsigned int irq, int node)
 {
-	struct irq_cfg **cfg;
+	struct irq_cfg *cfg;
 	unsigned long flags;
-	int irq, i;
-
-	if (from < nr_irqs_gsi)
-		from = nr_irqs_gsi;
+	int ret;
 
-	cfg = kzalloc_node(count * sizeof(cfg[0]), GFP_KERNEL, node);
+	cfg = alloc_irq_cfg(irq, node);
 	if (!cfg)
-		return 0;
-
-	irq = alloc_irqs_from(from, count, node);
-	if (irq < 0)
-		goto out_cfgs;
-
-	for (i = 0; i < count; i++) {
-		cfg[i] = alloc_irq_cfg(irq + i, node);
-		if (!cfg[i])
-			goto out_irqs;
-	}
+		return -ENOMEM;
 
 	raw_spin_lock_irqsave(&vector_lock, flags);
-	for (i = 0; i < count; i++)
-		if (__assign_irq_vector(irq + i, cfg[i], apic->target_cpus()))
-			goto out_vecs;
-	raw_spin_unlock_irqrestore(&vector_lock, flags);
-
-	for (i = 0; i < count; i++) {
-		irq_set_chip_data(irq + i, cfg[i]);
-		irq_clear_status_flags(irq + i, IRQ_NOREQUEST);
-	}
-
-	kfree(cfg);
-	return irq;
-
-out_vecs:
-	for (i--; i >= 0; i--)
-		__clear_irq_vector(irq + i, cfg[i]);
+	ret = __assign_irq_vector(irq, cfg, apic->target_cpus());
 	raw_spin_unlock_irqrestore(&vector_lock, flags);
-out_irqs:
-	for (i = 0; i < count; i++)
-		free_irq_at(irq + i, cfg[i]);
-out_cfgs:
-	kfree(cfg);
-	return 0;
-}
 
-unsigned int create_irq_nr(unsigned int from, int node)
-{
-	return __create_irqs(from, 1, node);
-}
-
-int create_irq(void)
-{
-	int node = cpu_to_node(0);
-	unsigned int irq_want;
-	int irq;
-
-	irq_want = nr_irqs_gsi;
-	irq = create_irq_nr(irq_want, node);
-
-	if (irq == 0)
-		irq = -1;
-
-	return irq;
+	if (!ret)
+		irq_set_chip_data(irq, cfg);
+	else
+		free_irq_cfg(irq, cfg);
+	return ret;
 }
 
-void destroy_irq(unsigned int irq)
+void arch_teardown_hwirq(unsigned int irq)
 {
 	struct irq_cfg *cfg = irq_get_chip_data(irq);
 	unsigned long flags;
 
-	irq_set_status_flags(irq, IRQ_NOREQUEST|IRQ_NOPROBE);
-
 	free_remapped_irq(irq);
-
 	raw_spin_lock_irqsave(&vector_lock, flags);
 	__clear_irq_vector(irq, cfg);
 	raw_spin_unlock_irqrestore(&vector_lock, flags);
-	free_irq_at(irq, cfg);
-}
-
-void destroy_irqs(unsigned int irq, unsigned int count)
-{
-	unsigned int i;
-
-	for (i = 0; i < count; i++)
-		destroy_irq(irq + i);
+	free_irq_cfg(irq, cfg);
 }
 
 /*
@@ -3136,8 +3062,8 @@ int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 
 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
-	unsigned int irq, irq_want;
 	struct msi_desc *msidesc;
+	unsigned int irq;
 	int node, ret;
 
 	/* Multiple MSI vectors only supported with interrupt remapping */
@@ -3145,28 +3071,25 @@ int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 		return 1;
 
 	node = dev_to_node(&dev->dev);
-	irq_want = nr_irqs_gsi;
+
 	list_for_each_entry(msidesc, &dev->msi_list, list) {
-		irq = create_irq_nr(irq_want, node);
-		if (irq == 0)
+		irq = irq_alloc_hwirq(node);
+		if (!irq)
 			return -ENOSPC;
 
-		irq_want = irq + 1;
-
 		ret = setup_msi_irq(dev, msidesc, irq, 0);
-		if (ret < 0)
-			goto error;
+		if (ret < 0) {
+			irq_free_hwirq(irq);
+			return ret;
+		}
+
 	}
 	return 0;
-
-error:
-	destroy_irq(irq);
-	return ret;
 }
 
 void native_teardown_msi_irq(unsigned int irq)
 {
-	destroy_irq(irq);
+	irq_free_hwirq(irq);
 }
 
 #ifdef CONFIG_DMAR_TABLE
@@ -3420,11 +3343,6 @@ static void __init probe_nr_irqs_gsi(void)
 	printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi);
 }
 
-int get_nr_irqs_gsi(void)
-{
-	return nr_irqs_gsi;
-}
-
 unsigned int arch_dynirq_lower_bound(unsigned int from)
 {
 	return from < nr_irqs_gsi ? nr_irqs_gsi : from;