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Subject: Re: [PATCH] ACPI / PPTT: get PPTT table in the first beginning
To:     Zenghui Yu <yuzenghui@huawei.com>,
        Sudeep Holla <sudeep.holla@arm.com>
CC:     Xiongfeng Wang <wangxiongfeng2@huawei.com>,
        <catalin.marinas@arm.com>, <will@kernel.org>, <rjw@rjwysocki.net>,
        <viresh.kumar@linaro.org>, <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <linux-acpi@vger.kernel.org>
References: <20210720112635.38565-1-wangxiongfeng2@huawei.com>
 <20210720133751.u6k6bdm7qco3gn65@bogus>
 <a1390a6f-62aa-4cfd-b34e-1dbf0aedfc50@huawei.com>
From:   Hanjun Guo <guohanjun@huawei.com>
Message-ID: <30c0b347-54fa-4113-d533-74b101b90f46@huawei.com>
Date:   Wed, 1 Sep 2021 16:15:11 +0800
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On 2021/9/1 15:29, Zenghui Yu wrote:
> On 2021/7/20 21:37, Sudeep Holla wrote:
>> On Tue, Jul 20, 2021 at 07:26:35PM +0800, Xiongfeng Wang wrote:
>>> When I added might_sleep() in down_timeout(), I got the following
>>
>> Sorry it is not clear if you are able to reproduce this issue without
>> any other modifications in the mainline kernel ?
> 
> Jump in this thread as the exact splat is triggered at boot time
> in the latest mainline kernel thanks to commit 99409b935c9a
> ("locking/semaphore: Add might_sleep() to down_*() family").

Please see the patch provided by Thomas Gleixner, it should
fix this issue in a better way:

https://lkml.org/lkml/2021/8/31/352

Thanks
Hanjun