Add linux-next specific files for 20151105

[karo-tx-linux.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index a44c40c03bddb7ae82c37f5ad1ba723d55c25b44..438ebf8bbab1ddaba0e25db37a8f2b1913859b96 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -338,11 +338,13 @@ static inline int oo_objects(struct kmem_cache_order_objects x)
  */
 static __always_inline void slab_lock(struct page *page)
 {
+       VM_BUG_ON_PAGE(PageTail(page), page);
        bit_spin_lock(PG_locked, &page->flags);
 }
 
 static __always_inline void slab_unlock(struct page *page)
 {
+       VM_BUG_ON_PAGE(PageTail(page), page);
        __bit_spin_unlock(PG_locked, &page->flags);
 }
 
@@ -459,8 +461,10 @@ static void get_map(struct kmem_cache *s, struct page *page, unsigned long *map)
 /*
  * Debug settings:
  */
-#ifdef CONFIG_SLUB_DEBUG_ON
+#if defined(CONFIG_SLUB_DEBUG_ON)
 static int slub_debug = DEBUG_DEFAULT_FLAGS;
+#elif defined(CONFIG_KASAN)
+static int slub_debug = SLAB_STORE_USER;
 #else
 static int slub_debug;
 #endif
@@ -1547,10 +1551,7 @@ static void free_slab(struct kmem_cache *s, struct page *page)
                        VM_BUG_ON(s->reserved != sizeof(*head));
                        head = page_address(page) + offset;
                } else {
-                       /*
-                        * RCU free overloads the RCU head over the LRU
-                        */
-                       head = (void *)&page->lru;
+                       head = &page->rcu_head;
                }
 
                call_rcu(head, rcu_free_slab);