diff options
| author | Stephen Boyd <sboyd@codeaurora.org> | 2017-09-07 11:42:30 -0700 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2019-12-23 23:43:34 +0200 |
| commit | 3c1b1d400484fd6d7fc11bd005626fe04085f6ef (patch) | |
| tree | 7616c8347af62dcfd052a2bd15d82bd21c1c3b55 /kernel/smp.c | |
| parent | 2590a10d3fffb0271466a169db6aabc314503b7d (diff) | |
smp: Wake up all idle CPUs when suspending to idle
Regardless of CPU isolation or not, we need to wake up all the
CPUs during suspend to idle so that each CPU can disable their
local tick device, etc. If we don't wake every CPU up, then we
don't fully suspend the system and things like sched_clock and
timekeeping are never stopped properly.
Change-Id: Ic9141602acc5e6cddefca0727f9be075dad3e498
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index b2ec21c5c9d6..3f300d3fd1f6 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -14,6 +14,7 @@ #include <linux/smp.h> #include <linux/cpu.h> #include <linux/sched.h> +#include <linux/suspend.h> #include "smpboot.h" @@ -766,7 +767,8 @@ void wake_up_all_idle_cpus(void) for_each_online_cpu(cpu) { if (cpu == smp_processor_id()) continue; - if (!cpu_isolated(cpu)) + if (suspend_freeze_state == FREEZE_STATE_ENTER || + !cpu_isolated(cpu)) wake_up_if_idle(cpu); } preempt_enable(); |