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authorChristoph Lameter <cl@linux.com>2012-09-04 23:18:33 (GMT)
committerPekka Enberg <penberg@kernel.org>2012-09-05 09:00:35 (GMT)
commit945cf2b6199be70ff03102b9e642c3bb05d01de9 (patch)
treeb0deef56b1d79af1054f0cf1bd91c6fb00ce31a5 /mm/slab_common.c
parent7c9adf5a5471647f392169ef19d3e81dcfa76045 (diff)
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mm/sl[aou]b: Extract a common function for kmem_cache_destroy
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>
Diffstat (limited to 'mm/slab_common.c')
-rw-r--r--mm/slab_common.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 5190a7c..a1c4f0b 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -140,6 +140,31 @@ out_locked:
}
EXPORT_SYMBOL(kmem_cache_create);
+void kmem_cache_destroy(struct kmem_cache *s)
+{
+ get_online_cpus();
+ mutex_lock(&slab_mutex);
+ s->refcount--;
+ if (!s->refcount) {
+ list_del(&s->list);
+
+ if (!__kmem_cache_shutdown(s)) {
+ if (s->flags & SLAB_DESTROY_BY_RCU)
+ rcu_barrier();
+
+ __kmem_cache_destroy(s);
+ } else {
+ list_add(&s->list, &slab_caches);
+ printk(KERN_ERR "kmem_cache_destroy %s: Slab cache still has objects\n",
+ s->name);
+ dump_stack();
+ }
+ }
+ mutex_unlock(&slab_mutex);
+ put_online_cpus();
+}
+EXPORT_SYMBOL(kmem_cache_destroy);
+
int slab_is_available(void)
{
return slab_state >= UP;