Merge branches 'slab/documentation', 'slab/fixes', 'slob/cleanups' and 'slub/fixes...
[sfrench/cifs-2.6.git] / mm / slab.c
index f257d4dd474db5f3ee0ed42016b86dd3d5b02bc4..d08692303f6e9f154f0e4b2a0786696db7f9b541 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2308,6 +2308,15 @@ kmem_cache_create (const char *name, size_t size, size_t align,
                /* really off slab. No need for manual alignment */
                slab_size =
                    cachep->num * sizeof(kmem_bufctl_t) + sizeof(struct slab);
+
+#ifdef CONFIG_PAGE_POISONING
+               /* If we're going to use the generic kernel_map_pages()
+                * poisoning, then it's going to smash the contents of
+                * the redzone and userword anyhow, so switch them off.
+                */
+               if (size % PAGE_SIZE == 0 && flags & SLAB_POISON)
+                       flags &= ~(SLAB_RED_ZONE | SLAB_STORE_USER);
+#endif
        }
 
        cachep->colour_off = cache_line_size();