From: Shaohua Li Date: Wed, 24 Aug 2011 23:47:24 +0000 (+1000) Subject: smp_call_function() only lets all other CPUs execute a specific function, X-Git-Tag: next-20110905~1^2~49 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f5a2f8b8a46f9e82f43203e26791ecb2f64f1b6f;p=karo-tx-linux.git smp_call_function() only lets all other CPUs execute a specific function, while we expect all CPUs do in intel_idle. Without the fix, we could have one cpu which has auto_demotion enabled or has no boradcast timer setup. Usually we don't see impact because auto demotion just harms power and the intel_idle init is called in CPU 0, where boradcast timer delivers interrupt, but this still could be a problem. Signed-off-by: Shaohua Li Cc: Len Brown Signed-off-by: Andrew Morton --- diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 18767f8ab090..0a5388260956 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -368,7 +368,7 @@ static int intel_idle_probe(void) if (boot_cpu_has(X86_FEATURE_ARAT)) /* Always Reliable APIC Timer */ lapic_timer_reliable_states = LAPIC_TIMER_ALWAYS_RELIABLE; else { - smp_call_function(__setup_broadcast_timer, (void *)true, 1); + on_each_cpu(__setup_broadcast_timer, (void *)true, 1); register_cpu_notifier(&setup_broadcast_notifier); } @@ -460,7 +460,7 @@ static int intel_idle_cpuidle_devices_init(void) } } if (auto_demotion_disable_flags) - smp_call_function(auto_demotion_disable, NULL, 1); + on_each_cpu(auto_demotion_disable, NULL, 1); return 0; } @@ -500,7 +500,7 @@ static void __exit intel_idle_exit(void) cpuidle_unregister_driver(&intel_idle_driver); if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE) { - smp_call_function(__setup_broadcast_timer, (void *)false, 1); + on_each_cpu(__setup_broadcast_timer, (void *)false, 1); unregister_cpu_notifier(&setup_broadcast_notifier); }