mm, sl[aou]b: Move kmem_cache_create mutex handling to common code
Move the mutex handling into the common kmem_cache_create()
function.
Then we can also move more checks out of SLAB's kmem_cache_create()
into the common code.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slub.c b/mm/slub.c
index 8c4fd37..0e0504ed 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3911,7 +3911,6 @@
struct kmem_cache *s;
char *n;
- mutex_lock(&slab_mutex);
s = find_mergeable(size, align, flags, name, ctor);
if (s) {
s->refcount++;
@@ -3924,37 +3923,36 @@
if (sysfs_slab_alias(s, name)) {
s->refcount--;
- goto err;
+ return NULL;
}
- mutex_unlock(&slab_mutex);
return s;
}
n = kstrdup(name, GFP_KERNEL);
if (!n)
- goto err;
+ return NULL;
s = kmalloc(kmem_size, GFP_KERNEL);
if (s) {
if (kmem_cache_open(s, n,
size, align, flags, ctor)) {
+ int r;
+
list_add(&s->list, &slab_caches);
mutex_unlock(&slab_mutex);
- if (sysfs_slab_add(s)) {
- mutex_lock(&slab_mutex);
- list_del(&s->list);
- kfree(n);
- kfree(s);
- goto err;
- }
- return s;
+ r = sysfs_slab_add(s);
+ mutex_lock(&slab_mutex);
+
+ if (!r)
+ return s;
+
+ list_del(&s->list);
+ kmem_cache_close(s);
}
kfree(s);
}
kfree(n);
-err:
- mutex_unlock(&slab_mutex);
- return s;
+ return NULL;
}
#ifdef CONFIG_SMP