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Commit 35b61edb authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

x86: Use tick broadcast expired check 



Avoid going back into deep idle if the tick broadcast IPI is about to
fire.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Arjan van de Veen <arjan@infradead.org>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20130306111537.702278273@linutronix.de
parent 80bbe9f2

arch/x86/kernel/process.c

+12 −0
Original line number Diff line number Diff line
@@ -336,6 +336,18 @@ void cpu_idle(void) 
			local_touch_nmi();

			local_irq_disable();



			/*

			 * We detected in the wakeup path that the

			 * tick broadcast device expired for us, but

			 * we raced with the other CPU and came back

			 * here before it was able to fire the IPI.

			 * No point in going idle.

			 */

			if (tick_check_broadcast_expired()) {

				local_irq_enable();

				continue;

			}



			enter_idle();



			/* Don't trace irqs off for idle */