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authorRafael J. Wysocki <rjw@sisk.pl>2007-05-09 02:35:10 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:56 -0700
commit8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d (patch)
treef4e305edaedbde05774bb1e4acd89a9475661d2e /net/iucv
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 'net/iucv')
-rw-r--r--net/iucv/iucv.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index fb3faf72e850..b7333061016d 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -556,6 +556,7 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
switch (action) {
case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
if (!percpu_populate(iucv_irq_data,
sizeof(struct iucv_irq_data),
GFP_KERNEL|GFP_DMA, cpu))
@@ -567,15 +568,20 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
}
break;
case CPU_UP_CANCELED:
+ case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
percpu_depopulate(iucv_param, cpu);
percpu_depopulate(iucv_irq_data, cpu);
break;
case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
case CPU_DOWN_FAILED:
+ case CPU_DOWN_FAILED_FROZEN:
smp_call_function_on(iucv_declare_cpu, NULL, 0, 1, cpu);
break;
case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
cpumask = iucv_buffer_cpumask;
cpu_clear(cpu, cpumask);
if (cpus_empty(cpumask))

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