tree 3677dabbfcfbee8ddc9d3c709c8892c460a1cc45
parent 6b6d188aae79a630957aefd88ff5c42af6553ee3
author Chunyan Zhang <zhang.lyra@gmail.com> 1578645542 +0800
committer Thomas Gleixner <tglx@linutronix.de> 1579120185 +0100

tick/common: Touch watchdog in tick_unfreeze() on all CPUs

Suspend to IDLE invokes tick_unfreeze() on resume. tick_unfreeze() on the
first resuming CPU resumes timekeeping, which also has the side effect of
resetting the softlockup watchdog on this CPU.

But on the secondary CPUs the watchdog is not reset in the resume /
unfreeze() path, which can result in false softlockup warnings on those
CPUs depending on the time spent in suspend.

Prevent this by clearing the softlock watchdog in the unfreeze path also
on the secondary resuming CPUs.

[ tglx: Massaged changelog ]

Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200110083902.27276-1-chunyan.zhang@unisoc.com