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mm/sl[aou]b: Extract a common function for kmem_cache_destroy

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kmem_cache_destroy does basically the same in all allocators.

Extract common code which is easy since we already have common mutex
handling.

Reviewed-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter
2012-09-04 23:18:33 +00:00
committed by Pekka Enberg
parent 7c9adf5a54
commit 945cf2b619
5 changed files with 49 additions and 75 deletions
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36
mm/slub.c
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@@ -624,7 +624,7 @@ static void object_err(struct kmem_cache *s, struct page *page,
print_trailer(s, page, object);
}
static void slab_err(struct kmem_cache *s, struct page *page, char *fmt, ...)
static void slab_err(struct kmem_cache *s, struct page *page, const char *fmt, ...)
{
va_list args;
char buf[100];
@@ -3146,7 +3146,7 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page,
sizeof(long), GFP_ATOMIC);
if (!map)
return;
slab_err(s, page, "%s", text);
slab_err(s, page, text, s->name);
slab_lock(page);
get_map(s, page, map);
@@ -3178,7 +3178,7 @@ static void free_partial(struct kmem_cache *s, struct kmem_cache_node *n)
discard_slab(s, page);
} else {
list_slab_objects(s, page,
"Objects remaining on kmem_cache_close()");
"Objects remaining in %s on kmem_cache_close()");
}
}
}
@@ -3191,7 +3191,6 @@ static inline int kmem_cache_close(struct kmem_cache *s)
int node;
flush_all(s);
free_percpu(s->cpu_slab);
/* Attempt to free all objects */
for_each_node_state(node, N_NORMAL_MEMORY) {
struct kmem_cache_node *n = get_node(s, node);
@@ -3200,33 +3199,20 @@ static inline int kmem_cache_close(struct kmem_cache *s)
if (n->nr_partial || slabs_node(s, node))
return 1;
}
free_percpu(s->cpu_slab);
free_kmem_cache_nodes(s);
return 0;
}
/*
* Close a cache and release the kmem_cache structure
* (must be used for caches created using kmem_cache_create)
*/
void kmem_cache_destroy(struct kmem_cache *s)
int __kmem_cache_shutdown(struct kmem_cache *s)
{
mutex_lock(&slab_mutex);
s->refcount--;
if (!s->refcount) {
list_del(&s->list);
mutex_unlock(&slab_mutex);
if (kmem_cache_close(s)) {
printk(KERN_ERR "SLUB %s: %s called for cache that "
"still has objects.\n", s->name, __func__);
dump_stack();
}
if (s->flags & SLAB_DESTROY_BY_RCU)
rcu_barrier();
sysfs_slab_remove(s);
} else
mutex_unlock(&slab_mutex);
return kmem_cache_close(s);
}
void __kmem_cache_destroy(struct kmem_cache *s)
{
sysfs_slab_remove(s);
}
EXPORT_SYMBOL(kmem_cache_destroy);
/********************************************************************
* Kmalloc subsystem