1 files changed, 5 insertions, 35 deletions

diff --git a/mm/slab.c b/mm/slab.c
index dfcc8885d7d5..264037449f08 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -829,12 +829,12 @@ static void init_reap_node(int cpu)
 
 static void next_reap_node(void)
 {
-        int node = __get_cpu_var(slab_reap_node);
+        int node = __this_cpu_read(slab_reap_node);
 
         node = next_node(node, node_online_map);
         if (unlikely(node >= MAX_NUMNODES))
                 node = first_node(node_online_map);
-        __get_cpu_var(slab_reap_node) = node;
+        __this_cpu_write(slab_reap_node, node);
 }
 
 #else
@@ -1012,7 +1012,7 @@ static void __drain_alien_cache(struct kmem_cache *cachep,
  */
 static void reap_alien(struct kmem_cache *cachep, struct kmem_list3 *l3)
 {
-        int node = __get_cpu_var(slab_reap_node);
+        int node = __this_cpu_read(slab_reap_node);
 
         if (l3->alien) {
                 struct array_cache *ac = l3->alien[node];
@@ -1293,7 +1293,7 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb,
                  * anything expensive but will only modify reap_work
                  * and reschedule the timer.
                 */
-                cancel_rearming_delayed_work(&per_cpu(slab_reap_work, cpu));
+                cancel_delayed_work_sync(&per_cpu(slab_reap_work, cpu));
                 /* Now the cache_reaper is guaranteed to be not running. */
                 per_cpu(slab_reap_work, cpu).work.func = NULL;
                 break;
@@ -2781,7 +2781,7 @@ static void slab_put_obj(struct kmem_cache *cachep, struct slab *slabp,
 /*
  * Map pages beginning at addr to the given cache and slab. This is required
  * for the slab allocator to be able to lookup the cache and slab of a
- * virtual address for kfree, ksize, kmem_ptr_validate, and slab debugging.
+ * virtual address for kfree, ksize, and slab debugging.
  */
 static void slab_map_pages(struct kmem_cache *cache, struct slab *slab,
                            void *addr)
@@ -3667,36 +3667,6 @@ kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags)
 EXPORT_SYMBOL(kmem_cache_alloc_trace);
 #endif
 
-/**
- * kmem_ptr_validate - check if an untrusted pointer might be a slab entry.
- * @cachep: the cache we're checking against
- * @ptr: pointer to validate
- *
- * This verifies that the untrusted pointer looks sane;
- * it is _not_ a guarantee that the pointer is actually
- * part of the slab cache in question, but it at least
- * validates that the pointer can be dereferenced and
- * looks half-way sane.
- *
- * Currently only used for dentry validation.
- */
-int kmem_ptr_validate(struct kmem_cache *cachep, const void *ptr)
-{
-        unsigned long size = cachep->buffer_size;
-        struct page *page;
-
-        if (unlikely(!kern_ptr_validate(ptr, size)))
-                goto out;
-        page = virt_to_page(ptr);
-        if (unlikely(!PageSlab(page)))
-                goto out;
-        if (unlikely(page_get_cache(page) != cachep))
-                goto out;
-        return 1;
-out:
-        return 0;
-}
-
 #ifdef CONFIG_NUMA
 void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
 {