linux-kernel - Re: [PATCH] futex: use wake_up_process() instead of wake_up

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Message-ID: <b135934766964005677a8faa983919b052409a54.camel@gmx.de>
Date:   Fri, 19 Mar 2021 06:21:43 +0100
From:   Mike Galbraith <efault@....de>
To:     Wang Qing <wangqing@...o.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] futex: use wake_up_process() instead of wake_up_state()

On Fri, 2021-03-19 at 10:59 +0800, Wang Qing wrote:
> Using wake_up_process() is more simpler and friendly,
> and it is more convenient for analysis and statistics

I likely needn't bother, and don't have a NAK to paste on this thing,
but here's another copy of my NOPE for yet another gratuitous change
with complete BS justification.

>
> Signed-off-by: Wang Qing <wangqing@...o.com>
> ---
>  kernel/futex.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/futex.c b/kernel/futex.c
> index e68db77..078a1f9
> --- a/kernel/futex.c
> +++ b/kernel/futex.c
> @@ -1820,7 +1820,7 @@ void requeue_pi_wake_futex(struct futex_q *q, union futex_key *key,
>
>  	q->lock_ptr = &hb->lock;
>
> -	wake_up_state(q->task, TASK_NORMAL);
> +	wake_up_process(q->task);
>  }
>
>  /**