Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...

[cascardo/linux.git] / include / linux / mm_types.h

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 680a5e4..074eb98 100644 (file)
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -57,8 +57,18 @@ struct page {
                };
 
                union {
+#if defined(CONFIG_HAVE_CMPXCHG_DOUBLE) && \
+       defined(CONFIG_HAVE_ALIGNED_STRUCT_PAGE)
                        /* Used for cmpxchg_double in slub */
                        unsigned long counters;
+#else
+                       /*
+                        * Keep _count separate from slub cmpxchg_double data.
+                        * As the rest of the double word is protected by
+                        * slab_lock but _count is not.
+                        */
+                       unsigned counters;
+#endif
 
                        struct {