migrate_timers: add comment, use spinlock_irq()
authorOleg Nesterov <oleg@tv-sign.ru>
Wed, 20 Aug 2008 23:46:04 +0000 (16:46 -0700)
committerIngo Molnar <mingo@elte.hu>
Thu, 21 Aug 2008 11:34:54 +0000 (13:34 +0200)
commitd82f0b0f6f1a0a25afc288fb7135b1601fe6df18
tree29991ab508ccfbacec6f6b2a7df714ee9d5c5fb5
parent6a55617ed5d1aa62b850de2cf66f5ede2eef4825
migrate_timers: add comment, use spinlock_irq()

Add the comment to explain why the double lock in migrate_timers()
can't deadlock.

Change the code to use spinlock_irq() instead of local_irq_disable()
+ spin_lock().

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/hrtimer.c
kernel/timer.c