[PATCH 2/2] mm: Use kvfree_rcu() in update_memcg_params()

[Kirill Tkhai]

Make update_memcg_params() to use generic kvfree_rcu()
helper and remove free_memcg_params() code.

Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
---
 mm/slab_common.c |   10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 10f127b2de7c..92d4a3a9471d 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -190,14 +190,6 @@ static void destroy_memcg_params(struct kmem_cache *s)
                kvfree(rcu_access_pointer(s->memcg_params.memcg_caches));
 }
 
-static void free_memcg_params(struct rcu_head *rcu)
-{
-       struct memcg_cache_array *old;
-
-       old = container_of(rcu, struct memcg_cache_array, rcu);
-       kvfree(old);
-}
-
 static int update_memcg_params(struct kmem_cache *s, int new_array_size)
 {
        struct memcg_cache_array *old, *new;
@@ -215,7 +207,7 @@ static int update_memcg_params(struct kmem_cache *s, int 
new_array_size)
 
        rcu_assign_pointer(s->memcg_params.memcg_caches, new);
        if (old)
-               call_rcu(&old->rcu, free_memcg_params);
+               kvfree_rcu(old, rcu);
        return 0;
 }