diff options
| author | Vikram Mulukutla <markivx@codeaurora.org> | 2014-10-31 16:03:20 -0700 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:32:11 +0200 |
| commit | a1fed10f708642227856cf6bb8ffcb6cdf16b656 (patch) | |
| tree | 90af733c81abee64fe75a5d42a6f43372d2c7489 /kernel | |
| parent | 9341553bff9a3ab1ae12ea471ba8888559f5c048 (diff) | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cpu/idle.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/cpu/idle.c b/kernel/cpu/idle.c index 32e69c73e..1b7cf4190 100644 --- a/kernel/cpu/idle.c +++ b/kernel/cpu/idle.c @@ -24,6 +24,9 @@ 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 |