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From: Will Deacon <will@kernel.org>
To: Xiaoming Ni <nixiaoming@huawei.com>
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	mingo@redhat.com, longman@redhat.com, boqun.feng@gmail.com,
	wangle6@huawei.com, xiaoqian9@huawei.com, shaolexi@huawei.com
Subject: Re: [PATCH] semaphore: Add might_sleep() to down_*() family
Date: Fri, 13 Aug 2021 15:43:06 +0100	[thread overview]
Message-ID: <20210813144305.GB8451@willie-the-truck> (raw)
In-Reply-To: <20210809021215.19991-1-nixiaoming@huawei.com>

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@huawei.com>
> ---
>  kernel/locking/semaphore.c | 4 ++++
>  1 file changed, 4 insertions(+)

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

Will

  parent reply	other threads:[~2021-08-13 14:43 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-09  2:12 Xiaoming Ni
2021-08-09  3:01 ` Waiman Long
2021-08-09  3:51   ` Xiaoming Ni
2021-08-09 12:52     ` Waiman Long
2021-08-09 14:33       ` Xiaoming Ni
2021-08-13 17:27   ` Thomas Gleixner
2021-08-13 18:47     ` Waiman Long
2021-08-13 14:43 ` Will Deacon [this message]
2021-08-23  9:39 ` [tip: locking/core] locking/semaphore: " tip-bot2 for Xiaoming Ni
2021-08-31 11:13 ` [PATCH] semaphore: " Guenter Roeck
2021-08-31 11:39   ` Hanjun Guo
2021-08-31 12:20     ` Thomas Gleixner
2021-08-31 11:40   ` Peter Zijlstra
2021-08-31 12:13   ` Thomas Gleixner
2021-08-31 12:34     ` Will Deacon
2021-08-31 17:42     ` Guenter Roeck
2021-09-01  8:37     ` [tip: smp/urgent] drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION() tip-bot2 for Thomas Gleixner

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