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authorRafael J. Wysocki <rjw@sisk.pl>2007-05-09 05:35:10 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 15:30:56 -0400
commit8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d (patch)
treef4e305edaedbde05774bb1e4acd89a9475661d2e /fs/buffer.c
parentf37bc2712b54ec641e0c0c8634f1a4b61d9956c0 (diff)
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 'fs/buffer.c')
-rw-r--r--fs/buffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index fc2d763a8d78..aecd057cd0e0 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2946,7 +2946,7 @@ static void buffer_exit_cpu(int cpu)
2946static int buffer_cpu_notify(struct notifier_block *self, 2946static int buffer_cpu_notify(struct notifier_block *self,
2947 unsigned long action, void *hcpu) 2947 unsigned long action, void *hcpu)
2948{ 2948{
2949 if (action == CPU_DEAD) 2949 if (action == CPU_DEAD || action == CPU_DEAD_FROZEN)
2950 buffer_exit_cpu((unsigned long)hcpu); 2950 buffer_exit_cpu((unsigned long)hcpu);
2951 return NOTIFY_OK; 2951 return NOTIFY_OK;
2952} 2952}