Subject: sched: Reorder root_domain to remove 64 bit alignment padding
From: Richard Kennedy <richard@rsk.demon.co.uk>
Date: Fri, 15 Jul 2011 11:41:31 +0100
Git-commit: 26a148eb9c790149750f7e77da0d96029443d400
Patch-mainline: v3.1-rc1

Reorder root_domain to remove 8 bytes of alignment padding on 64 bit
builds, this shrinks the size from 1736 to 1728 bytes, therefore using
one fewer cachelines.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1310726492.1977.5.camel@castor.rsk
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Mike Galbraith <mgalbraith@suse.de>

---
 kernel/sched.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-3.0-SLE11-SP2-3.0/kernel/sched.c
===================================================================
--- linux-3.0-SLE11-SP2-3.0.orig/kernel/sched.c
+++ linux-3.0-SLE11-SP2-3.0/kernel/sched.c
@@ -422,6 +422,7 @@ struct rt_rq {
  */
 struct root_domain {
 	atomic_t refcount;
+	atomic_t rto_count;
 	struct rcu_head rcu;
 	cpumask_var_t span;
 	cpumask_var_t online;
@@ -431,7 +432,6 @@ struct root_domain {
 	 * one runnable RT task.
 	 */
 	cpumask_var_t rto_mask;
-	atomic_t rto_count;
 	struct cpupri cpupri;
 };
 

