linux-kernel - Re: [PATCH 07/13] task_work: Introduce task_work

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Message-ID: <01459886-2393-665a-43b1-70082ceace0c@kernel.dk>
Date:   Wed, 9 Mar 2022 14:05:50 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Alexey Gladkov <legion@...nel.org>,
        Kyle Huey <me@...ehuey.com>, Oleg Nesterov <oleg@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Al Viro <viro@...IV.linux.org.uk>
Subject: Re: [PATCH 07/13] task_work: Introduce task_work_pending

On 3/9/22 9:24 AM, Eric W. Biederman wrote:
> diff --git a/include/linux/task_work.h b/include/linux/task_work.h
> index 5b8a93f288bb..897494b597ba 100644
> --- a/include/linux/task_work.h
> +++ b/include/linux/task_work.h
> @@ -19,6 +19,11 @@ enum task_work_notify_mode {
>  	TWA_SIGNAL,
>  };
>  
> +static inline bool task_work_pending(struct task_struct *task)
> +{
> +	return READ_ONCE(task->task_works);
> +}
> +

Most of the checks for this is current, do we need READ_ONCE here?

-- 
Jens Axboe