[PATCH] slab: extract __kmem_cache_destroy from kmem_cache_destroy

The ability to free memory allocated to a slab cache is also useful if an
error occurs during setup of a slab.  So extract the function.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/mm/slab.c b/mm/slab.c
index 5e59ce7..c714741 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1833,6 +1833,27 @@ static void set_up_list3s(struct kmem_cache *cachep, int index)
        }
 }
 
+static void __kmem_cache_destroy(struct kmem_cache *cachep)
+{
+       int i;
+       struct kmem_list3 *l3;
+
+       for_each_online_cpu(i)
+           kfree(cachep->array[i]);
+
+       /* NUMA: free the list3 structures */
+       for_each_online_node(i) {
+               l3 = cachep->nodelists[i];
+               if (l3) {
+                       kfree(l3->shared);
+                       free_alien_cache(l3->alien);
+                       kfree(l3);
+               }
+       }
+       kmem_cache_free(&cache_cache, cachep);
+}
+
+
 /**
  * calculate_slab_order - calculate size (page order) of slabs
  * @cachep: pointer to the cache that is being created
@@ -2404,9 +2425,6 @@ EXPORT_SYMBOL(kmem_cache_shrink);
  */
 int kmem_cache_destroy(struct kmem_cache *cachep)
 {
-       int i;
-       struct kmem_list3 *l3;
-
        BUG_ON(!cachep || in_interrupt());
 
        /* Don't let CPUs to come and go */
@@ -2432,19 +2450,7 @@ int kmem_cache_destroy(struct kmem_cache *cachep)
        if (unlikely(cachep->flags & SLAB_DESTROY_BY_RCU))
                synchronize_rcu();
 
-       for_each_online_cpu(i)
-           kfree(cachep->array[i]);
-
-       /* NUMA: free the list3 structures */
-       for_each_online_node(i) {
-               l3 = cachep->nodelists[i];
-               if (l3) {
-                       kfree(l3->shared);
-                       free_alien_cache(l3->alien);
-                       kfree(l3);
-               }
-       }
-       kmem_cache_free(&cache_cache, cachep);
+       __kmem_cache_destroy(cachep);
        unlock_cpu_hotplug();
        return 0;
 }