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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-05-09 02:35:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-09 12:30:56 -0700 |
| commit | 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d (patch) | |
| tree | f4e305edaedbde05774bb1e4acd89a9475661d2e /kernel/timer.c | |
| parent | f37bc2712b54ec641e0c0c8634f1a4b61d9956c0 (diff) | |
| download | linux-8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d.tar.gz | |
Add suspend-related notifications for CPU hotplug
Since nonboot CPUs are now disabled after tasks and devices have been frozen and the CPU hotplug infrastructure is used for this purpose, we need special CPU hotplug notifications that will help the CPU-hotplug-aware subsystems distinguish normal CPU hotplug events from CPU hotplug events related to a system-wide suspend or resume operation in progress. This patch introduces such notifications and causes them to be used during suspend and resume transitions. It also changes all of the CPU-hotplug-aware subsystems to take these notifications into consideration (for now they are handled in the same way as the corresponding "normal" ones). [oleg@tv-sign.ru: cleanups] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/timer.c')
| -rw-r--r-- | kernel/timer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index 58f6dd07c80b..de85f8491c1d 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1293,11 +1293,13 @@ static int __cpuinit timer_cpu_notify(struct notifier_block *self, long cpu = (long)hcpu; switch(action) { case CPU_UP_PREPARE: + case CPU_UP_PREPARE_FROZEN: if (init_timers_cpu(cpu) < 0) return NOTIFY_BAD; break; #ifdef CONFIG_HOTPLUG_CPU case CPU_DEAD: + case CPU_DEAD_FROZEN: migrate_timers(cpu); break; #endif |