linux-kernel - Re: [PATCH] dm raid: don't use 'const' in function return

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Date:	Thu, 16 Jun 2016 18:21:25 +0200
From:	Heinz Mauelshagen <heinzm@...hat.com>
To:	Arnd Bergmann <arnd@...db.de>, Mike Snitzer <snitzer@...hat.com>
Cc:	Alasdair Kergon <agk@...hat.com>, dm-devel@...hat.com,
	Shaohua Li <shli@...nel.org>, linux-raid@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dm raid: don't use 'const' in function return


Thanks Arnd.

On 06/16/2016 11:03 AM, Arnd Bergmann wrote:
> A newly introduced function has 'const int' as the return type,
> but as "make W=1" reports, that has no meaning:
>
> drivers/md/dm-raid.c:510:18: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers]
>
> This changes the return type to plain 'int'.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 33e53f06850f ("dm raid: introduce extended superblock and new raid types to support takeover/reshaping")
> ---
>   drivers/md/dm-raid.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
> index 96bcff7a0b94..55d25ac87bda 100644
> --- a/drivers/md/dm-raid.c
> +++ b/drivers/md/dm-raid.c
> @@ -507,7 +507,7 @@ static const char *raid10_md_layout_to_format(int layout)
>   }
>   
>   /* Return md raid10 algorithm for @name */
> -static const int raid10_name_to_format(const char *name)
> +static int raid10_name_to_format(const char *name)
>   {
>   	if (!strcasecmp(name, "near"))
>   		return ALGORITHM_RAID10_NEAR;