[PATCH V2 1/3] mm/slub: pack red_left_pad with another int to save a word

[Wei Yang]

On 64bit arch, struct is 8-bytes aligned, so int will occupy a word if it
doesn't sits well.

This patch pack red_left_pad with reserved to save 8 bytes for struct
kmem_cache on a 64bit arch.

Signed-off-by: Wei Yang <richard.weiy...@gmail.com>
---
 include/linux/slub_def.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 07ef550c6627..ec13aab32647 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -79,9 +79,9 @@ struct kmem_cache {
        int inuse;              /* Offset to metadata */
        int align;              /* Alignment */
        int reserved;           /* Reserved bytes at the end of slabs */
+       int red_left_pad;       /* Left redzone padding size */
        const char *name;       /* Name (only for display!) */
        struct list_head list;  /* List of slab caches */
-       int red_left_pad;       /* Left redzone padding size */
 #ifdef CONFIG_SYSFS
        struct kobject kobj;    /* For sysfs */
 #endif
-- 
2.11.0