linux-kernel - Re: [PATCH] semaphore: Add might_sleep() to down

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Message-ID: <20210813144305.GB8451@willie-the-truck>
Date:   Fri, 13 Aug 2021 15:43:06 +0100
From:   Will Deacon <will@...nel.org>
To:     Xiaoming Ni <nixiaoming@...wei.com>
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org,
        mingo@...hat.com, longman@...hat.com, boqun.feng@...il.com,
        wangle6@...wei.com, xiaoqian9@...wei.com, shaolexi@...wei.com
Subject: Re: [PATCH] semaphore: Add might_sleep() to down_*() family

On Mon, Aug 09, 2021 at 10:12:15AM +0800, Xiaoming Ni wrote:
> Semaphore is sleeping lock. Add might_sleep() to down*() family
> (with exception of down_trylock()) to detect atomic context sleep.
> 
> Previously discussed with Peter Zijlstra, see link:
>  https://lore.kernel.org/lkml/20210806082320.GD22037@worktop.programming.kicks-ass.net

You can use a Link: tag here.

> Signed-off-by: Xiaoming Ni <nixiaoming@...wei.com>
> ---
>  kernel/locking/semaphore.c | 4 ++++
>  1 file changed, 4 insertions(+)

Acked-by: Will Deacon <will@...nel.org>

Will