stop_machine: struct cpu_stopper, remove alignment padding on 64 bits

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 <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Rusty Russell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 70f8d90331e90359ae555b11d7c5c3ce7fe1a4fb..4372ccb25127ea8548719c78cb4a610edb94febf 100644 (file)
--- a/kernel/stop_machine.c
+++ b/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);