node isn't changed, so we don't need to retreive this structure
everytime we move the object. Maybe compiler do this optimization,
but making it explicitly is better.

Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>

diff --git a/mm/slab.c b/mm/slab.c
index 6d17cad..53d1a36 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3361,6 +3361,7 @@ static void free_block(struct kmem_cache *cachep, void 
**objpp, int nr_objects,
        int i;
        struct kmem_cache_node *n;
 
+       n = cachep->node[node];
        for (i = 0; i < nr_objects; i++) {
                void *objp;
                struct page *page;
@@ -3368,7 +3369,6 @@ static void free_block(struct kmem_cache *cachep, void 
**objpp, int nr_objects,
                objp = clear_obj_pfmemalloc(objpp[i]);
 
                page = virt_to_head_page(objp);
-               n = cachep->node[node];
                list_del(&page->lru);
                check_spinlock_acquired_node(cachep, node);
                slab_put_obj(cachep, page, objp, node);
-- 
1.7.9.5

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