linux-kernel - Re: [RFC]Documentation:accounting:getdelays.c Fix: warning: variable ‘i’ set but not used

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Date:	Tue, 12 Apr 2011 17:44:49 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	rdunlap@...otime.net, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, Balbir Singh <balbir@...ibm.com>
Subject: Re: [RFC]Documentation:accounting:getdelays.c Fix: warning: variable ‘i’ set but not used

On 04/12/2011 05:26 PM, Andrew Morton wrote:
> On Tue,  5 Apr 2011 09:02:50 -0700
> "Justin P. Mattock"<justinmattock@...il.com>  wrote:
>
>> Keep in mind there is another warning with this file, but need am unsure what might be the best solution:
>> Documentation/accounting/getdelays.c: In function ___get_family_id___:
>> Documentation/accounting/getdelays.c:172:14: warning: variable ___rc___ set but not used [-Wunused-but-set-variable]
>
> this?

there was two warnings with that one..(or atleast that what I am seeing 
over here).

>
>
> Subject: Documentation/accounting/getdelays.c: handle sendto() failures
> From: Andrew Morton<akpm@...ux-foundation.org>
>
> Documentation/accounting/getdelays.c: In function `get_family_id':
> Documentation/accounting/getdelays.c:172:14: warning: variable `rc' set but not used [-Wunused-but-set-variable]
>
> Reported-by: "Justin P. Mattock"<justinmattock@...il.com>
> Cc: Balbir Singh<balbir@...ibm.com>
> Signed-off-by: Andrew Morton<akpm@...ux-foundation.org>
> ---
>
>   Documentation/accounting/getdelays.c |    2 ++
>   1 file changed, 2 insertions(+)
>
> diff -puN Documentation/accounting/getdelays.c~documentation-accounting-getdelaysc-handle-sendto-failures Documentation/accounting/getdelays.c
> --- a/Documentation/accounting/getdelays.c~documentation-accounting-getdelaysc-handle-sendto-failures
> +++ a/Documentation/accounting/getdelays.c
> @@ -177,6 +177,8 @@ static int get_family_id(int sd)
>   	rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY,
>   			CTRL_ATTR_FAMILY_NAME, (void *)name,
>   			strlen(TASKSTATS_GENL_NAME)+1);
> +	if (rc<  0)
> +		return 0;	/* sendto() failure? */
>
>   	rep_len = recv(sd,&ans, sizeof(ans), 0);
>   	if (ans.n.nlmsg_type == NLMSG_ERROR ||
> _
>
>

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