Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH] ACPI / PPTT: get PPTT table in the first beginning
To:     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>,
        <guohanjun@huawei.com>
References: <20210720112635.38565-1-wangxiongfeng2@huawei.com>
 <20210720133751.u6k6bdm7qco3gn65@bogus>
From:   Zenghui Yu <yuzenghui@huawei.com>
Message-ID: <a1390a6f-62aa-4cfd-b34e-1dbf0aedfc50@huawei.com>
Date:   Wed, 1 Sep 2021 15:29:26 +0800
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.9.0
MIME-Version: 1.0
In-Reply-To: <20210720133751.u6k6bdm7qco3gn65@bogus>
Content-Type: text/plain; charset="utf-8"; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Precedence: bulk

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").