linux-kernel - Re: [PATCH v3] workqueue: Wrap flush

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Message-ID: <eaf82e8001a370d7be779bd15163f7210a968e8b.camel@perches.com>
Date:   Mon, 16 May 2022 00:18:28 -0700
From:   Joe Perches <joe@...ches.com>
To:     Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Tejun Heo <tj@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, gcc <gcc@....gnu.org>
Subject: Re: [PATCH v3] workqueue: Wrap flush_workqueue() using a macro

On Mon, 2022-05-16 at 14:00 +0900, Tetsuo Handa wrote:
[]
> Changes in v3:
>   Revert suggested change in v2, for kernel test robot <lkp@...el.com> found
> 
>     warning: Function parameter or member 'flush_workqueue' not described in 'void'
>     warning: expecting prototype for flush_workqueue(). Prototype was for void() instead
> 
>   when built with W=1 option.

Odd, perhaps that not a valid error message and is a defect
in gcc's parsing of function definitions.

> Changes in v2:
>   Use "void (flush_workqueue)(struct workqueue_struct *wq)" and remove
>   "#undef flush_workqueue", suggested by Joe Perches <joe@...ches.com>.