Commit a00c5ba3 authored Oct 31, 2014 by Vikram Mulukutla

idle: Add a memory barrier after setting cpu_idle_force_poll



To ensure that CPUs see cpu_idle_force_poll flag
updates, add a memory barrier after writing to
the flag.

Change-Id: Ic3fdef7d17b673247bce5093530ce8aa08694632
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>

parent 963d2418

kernel/cpu/idle.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,9 @@ void cpu_idle_poll_ctrl(bool enable)
		cpu_idle_force_poll--;
		WARN_ON_ONCE(cpu_idle_force_poll < 0);
		}

		/* Make sure poll mode is entered on all CPUs after the flag is set */
		mb();
		}

		#ifdef CONFIG_GENERIC_IDLE_POLL_SETUP