linux-kernel - Re: [PATCH] locks: remove trailing semicolon in macro definition

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Message-ID: <20201127195323.GZ4327@casper.infradead.org>
Date:   Fri, 27 Nov 2020 19:53:23 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     trix@...hat.com
Cc:     jlayton@...nel.org, bfields@...ldses.org, viro@...iv.linux.org.uk,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] locks: remove trailing semicolon in macro definition

On Fri, Nov 27, 2020 at 11:07:07AM -0800, trix@...hat.com wrote:
> +++ b/fs/fcntl.c
> @@ -526,7 +526,7 @@ SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
>  	(dst)->l_whence = (src)->l_whence;	\
>  	(dst)->l_start = (src)->l_start;	\
>  	(dst)->l_len = (src)->l_len;		\
> -	(dst)->l_pid = (src)->l_pid;
> +	(dst)->l_pid = (src)->l_pid

This should be wrapped in a do { } while (0).

Look, this warning is clearly great at finding smelly code, but the
fixes being generated to shut up the warning are low quality.