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

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Message-ID: <20201219150406.16925-1-lecopzer.chen@mediatek.com>
Date:   Sat, 19 Dec 2020 23:04:06 +0800
From:   Lecopzer Chen <lecopzer.chen@...iatek.com>
To:     <oliver.sang@...el.com>
CC:     <alexandru.elisei@....com>, <lecopzer.chen@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <lkp@...el.com>,
        <lkp@...ts.01.org>, <matthias.bgg@...il.com>,
        <sumit.garg@...aro.org>, <will@...nel.org>,
        <yj.chiang@...iatek.com>
Subject: Re: [PATCH] kernel/watchdog_hld.c: Fix access percpu in preemptible context  


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@...el.com>
>