From 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 9 May 2007 02:35:10 -0700 Subject: 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 Cc: Gautham R Shenoy Cc: Pavel Machek Signed-off-by: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/ia64/kernel/err_inject.c | 2 ++ arch/ia64/kernel/palinfo.c | 2 ++ arch/ia64/kernel/salinfo.c | 2 ++ arch/ia64/kernel/topology.c | 2 ++ 4 files changed, 8 insertions(+) (limited to 'arch/ia64') diff --git a/arch/ia64/kernel/err_inject.c b/arch/ia64/kernel/err_inject.c index d3e9f33e8bd..6a49600cf33 100644 --- a/arch/ia64/kernel/err_inject.c +++ b/arch/ia64/kernel/err_inject.c @@ -236,9 +236,11 @@ static int __cpuinit err_inject_cpu_callback(struct notifier_block *nfb, sys_dev = get_cpu_sysdev(cpu); switch (action) { case CPU_ONLINE: + case CPU_ONLINE_FROZEN: err_inject_add_dev(sys_dev); break; case CPU_DEAD: + case CPU_DEAD_FROZEN: err_inject_remove_dev(sys_dev); break; } diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c index a71df9ae039..85829e27785 100644 --- a/arch/ia64/kernel/palinfo.c +++ b/arch/ia64/kernel/palinfo.c @@ -975,9 +975,11 @@ static int palinfo_cpu_callback(struct notifier_block *nfb, switch (action) { case CPU_ONLINE: + case CPU_ONLINE_FROZEN: create_palinfo_proc_entries(hotcpu); break; case CPU_DEAD: + case CPU_DEAD_FROZEN: remove_palinfo_proc_entries(hotcpu); break; } diff --git a/arch/ia64/kernel/salinfo.c b/arch/ia64/kernel/salinfo.c index a51f1d0bfb7..89f6b138a62 100644 --- a/arch/ia64/kernel/salinfo.c +++ b/arch/ia64/kernel/salinfo.c @@ -582,6 +582,7 @@ salinfo_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu struct salinfo_data *data; switch (action) { case CPU_ONLINE: + case CPU_ONLINE_FROZEN: spin_lock_irqsave(&data_saved_lock, flags); for (i = 0, data = salinfo_data; i < ARRAY_SIZE(salinfo_data); @@ -592,6 +593,7 @@ salinfo_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu spin_unlock_irqrestore(&data_saved_lock, flags); break; case CPU_DEAD: + case CPU_DEAD_FROZEN: spin_lock_irqsave(&data_saved_lock, flags); for (i = 0, data = salinfo_data; i < ARRAY_SIZE(salinfo_data); diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c index 687500ddb4b..94ae3c87d82 100644 --- a/arch/ia64/kernel/topology.c +++ b/arch/ia64/kernel/topology.c @@ -412,9 +412,11 @@ static int __cpuinit cache_cpu_callback(struct notifier_block *nfb, sys_dev = get_cpu_sysdev(cpu); switch (action) { case CPU_ONLINE: + case CPU_ONLINE_FROZEN: cache_add_dev(sys_dev); break; case CPU_DEAD: + case CPU_DEAD_FROZEN: cache_remove_dev(sys_dev); break; } -- cgit v1.2.3-70-g09d2