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authorChristoph Lameter <clameter@sgi.com>2007-07-17 04:03:19 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-17 10:23:01 -0700
commit5b95a4acf157eee552e013795b54eaa2ab1ee4a1 (patch)
tree8222033f1db996fd6ce28ce3685edc8b17793b0b /mm
parent2492268472e7d326a6fe10f92f9211c4578f2482 (diff)
SLUB: use list_for_each_entry for loops over all slabs
Use list_for_each_entry() instead of list_for_each(). Get rid of for_all_slabs(). It had only one user. So fold it into the callback. This also gets rid of cpu_slab_flush. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slub.c51
1 files changed, 13 insertions, 38 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 2b9e656f1cb..3c9e98f0999 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2573,7 +2573,7 @@ static struct kmem_cache *find_mergeable(size_t size,
size_t align, unsigned long flags,
void (*ctor)(void *, struct kmem_cache *, unsigned long))
{
- struct list_head *h;
+ struct kmem_cache *s;
if (slub_nomerge || (flags & SLUB_NEVER_MERGE))
return NULL;
@@ -2585,10 +2585,7 @@ static struct kmem_cache *find_mergeable(size_t size,
align = calculate_alignment(flags, align, size);
size = ALIGN(size, align);
- list_for_each(h, &slab_caches) {
- struct kmem_cache *s =
- container_of(h, struct kmem_cache, list);
-
+ list_for_each_entry(s, &slab_caches, list) {
if (slab_unmergeable(s))
continue;
@@ -2670,33 +2667,6 @@ void *kmem_cache_zalloc(struct kmem_cache *s, gfp_t flags)
EXPORT_SYMBOL(kmem_cache_zalloc);
#ifdef CONFIG_SMP
-static void for_all_slabs(void (*func)(struct kmem_cache *, int), int cpu)
-{
- struct list_head *h;
-
- down_read(&slub_lock);
- list_for_each(h, &slab_caches) {
- struct kmem_cache *s =
- container_of(h, struct kmem_cache, list);
-
- func(s, cpu);
- }
- up_read(&slub_lock);
-}
-
-/*
- * Version of __flush_cpu_slab for the case that interrupts
- * are enabled.
- */
-static void cpu_slab_flush(struct kmem_cache *s, int cpu)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- __flush_cpu_slab(s, cpu);
- local_irq_restore(flags);
-}
-
/*
* Use the cpu notifier to insure that the cpu slabs are flushed when
* necessary.
@@ -2705,13 +2675,21 @@ static int __cpuinit slab_cpuup_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
+ struct kmem_cache *s;
+ unsigned long flags;
switch (action) {
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
- for_all_slabs(cpu_slab_flush, cpu);
+ down_read(&slub_lock);
+ list_for_each_entry(s, &slab_caches, list) {
+ local_irq_save(flags);
+ __flush_cpu_slab(s, cpu);
+ local_irq_restore(flags);
+ }
+ up_read(&slub_lock);
break;
default:
break;
@@ -3736,7 +3714,7 @@ static int sysfs_slab_alias(struct kmem_cache *s, const char *name)
static int __init slab_sysfs_init(void)
{
- struct list_head *h;
+ struct kmem_cache *s;
int err;
err = subsystem_register(&slab_subsys);
@@ -3747,10 +3725,7 @@ static int __init slab_sysfs_init(void)
slab_state = SYSFS;
- list_for_each(h, &slab_caches) {
- struct kmem_cache *s =
- container_of(h, struct kmem_cache, list);
-
+ list_for_each_entry(s, &slab_caches, list) {
err = sysfs_slab_add(s);
BUG_ON(err);
}