cfq: remove 8 bytes of padding from cfq_rb_root on 64 bit builds

Reorder cfq_rb_root to remove 8 bytes of padding on 64 bit builds.

Consequently removing 56 bytes from cfq_group and 64 bytes from
cfq_data.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 0db07d7..dee9d93 100644 (file)
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -78,11 +78,12 @@ struct cfq_rb_root {
        struct rb_root rb;
        struct rb_node *left;
        unsigned count;
+       unsigned total_weight;
        u64 min_vdisktime;
        struct rb_node *active;
-       unsigned total_weight;
 };
-#define CFQ_RB_ROOT    (struct cfq_rb_root) { RB_ROOT, NULL, 0, 0, }
+#define CFQ_RB_ROOT    (struct cfq_rb_root) { .rb = RB_ROOT, .left = NULL, \
+                       .count = 0, .min_vdisktime = 0, }
 
 /*
  * Per process-grouping structure