+ stop_machine-struct-cpu_stopper-remove-alignment-padding-on-64-bits.patch added to -mm tree

+ stop_machine-struct-cpu_stopper-remove-alignment-padding-on-64-bits.patch added to -mm tree

[akpm]

The patch titled
     stop_machine: struct cpu_stopper, remove alignment padding on 64 bits
has been added to the -mm tree.  Its filename is
     stop_machine-struct-cpu_stopper-remove-alignment-padding-on-64-bits.patch

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------------------------------------------------------
Subject: stop_machine: struct cpu_stopper, remove alignment padding on 64 bits
From: Richard Kennedy <richard@rsk.demon.co.uk>

Reorder elements in structure cpu_stopper to remove alignment padding on
64 bit builds, this shrinks its size from 40 to 32 bytes saving 8 bytes
per cpu.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

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

diff -puN kernel/stop_machine.c~stop_machine-struct-cpu_stopper-remove-alignment-padding-on-64-bits kernel/stop_machine.c
--- a/kernel/stop_machine.c~stop_machine-struct-cpu_stopper-remove-alignment-padding-on-64-bits
+++ a/kernel/stop_machine.c
@@ -35,9 +35,9 @@ struct cpu_stop_done {
 /* the actual stopper, one per every possible cpu, enabled on online cpus */
 struct cpu_stopper {
 	spinlock_t		lock;
+	bool			enabled;	/* is this stopper enabled? */
 	struct list_head	works;		/* list of pending works */
 	struct task_struct	*thread;	/* stopper thread */
-	bool			enabled;	/* is this stopper enabled? */
 };
 
 static DEFINE_PER_CPU(struct cpu_stopper, cpu_stopper);
_

Patches currently in -mm which might be from richard@rsk.demon.co.uk are

origin.patch
linux-next.patch
timer_list-remove-alignment-padding-on-64-bit-when-config_timer_stats.patch
buffer_head-remove-redundant-test-from-wait_on_buffer.patch
writeback-reduce-calls-to-global_page_state-in-balance_dirty_pages.patch
stop_machine-struct-cpu_stopper-remove-alignment-padding-on-64-bits.patch