[PATCH] kernel/watchdog_hld.c: Fix access percpu in preemptible context

[Lecopzer Chen]

Thanks a lot, I'll try to fix this in anthoer way(patch v2) to avoid
regreesion other than arm64

BRs,
Lecopzer


> Greeting,
> 
> FYI, we noticed the following commit (built with gcc-9):
> 
> commit: 6e37d53a67753bcb12a0b9102cac85d98f8a0453 ("[PATCH] kernel/watchdog_hld.c: Fix access percpu in preemptible context")
> url: https://github.com/0day-ci/linux/commits/Lecopzer-Chen/kernel-watchdog_hld-c-Fix-access-percpu-in-preemptible-context/20201217-211549
> base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git accefff5b547a9a1d959c7e76ad539bf2480e78b
> 
> in testcase: boot
> 
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
> 
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> 
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang at intel.com>
>