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[03/22] idle/intel: Remove superfluous SMP fuction call

Message ID 20161126231350.10321-4-bigeasy@linutronix.de (mailing list archive)
State Accepted, archived
Delegated to: Rafael Wysocki
Headers show

Commit Message

Sebastian Andrzej Siewior Nov. 26, 2016, 11:13 p.m. UTC 
From: Anna-Maria Gleixner <anna-maria@linutronix.de>

Since commit 1cf4f629d9d2 ("cpu/hotplug: Move online calls to
hotplugged cpu") the CPU_ONLINE and CPU_DOWN_PREPARE notifiers are
always run on the hot plugged CPU, and as of commit 3b9d6da67e11
("cpu/hotplug: Fix rollback during error-out in __cpu_disable()") the
CPU_DOWN_FAILED notifier also runs on the hot plugged CPU. This patch
converts the SMP functional calls into direct calls.

smp_function_call_single() executes the function with interrupts
disabled. This calling convention is not preserved, because
tick_broadcast_enable() and tick_braodcast_disable() handle
interrupts themselves.

Cc: Len Brown <lenb@kernel.org>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/idle/intel_idle.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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Patch

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 4466a2f969d7..f53b42a78186 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -927,8 +927,7 @@  static int cpu_hotplug_notify(struct notifier_block *n,
 	case CPU_ONLINE:
 
 		if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE)
-			smp_call_function_single(hotcpu, __setup_broadcast_timer,
-						 (void *)true, 1);
+			__setup_broadcast_timer((void *)true);
 
 		/*
 		 * Some systems can hotplug a cpu at runtime after