linux-kernel - Re: [PATCH] staging: lustre: fid: lproc_fid: Removed variables that is never used

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Date:	Wed, 28 Jan 2015 17:22:46 -0800
From:	Joe Perches <joe@...ches.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc:	Oleg Drokin <oleg.drokin@...el.com>,
	Andreas Dilger <andreas.dilger@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dmitry Eremin <dmitry.eremin@...el.com>,
	Eddie Kovsky <ewk@...ovsky.org>, Anil Belur <askb23@...il.com>,
	HPDD-discuss@...ts.01.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: lustre: fid: lproc_fid: Removed variables that
 is never used

On Wed, 2015-01-28 at 23:46 +0100, Rickard Strandqvist wrote:
> Variable ar assigned a value that is never used.
> I have also removed all the code that thereby serves no purpose.
[]
> diff --git a/drivers/staging/lustre/lustre/fid/lproc_fid.c b/drivers/staging/lustre/lustre/fid/lproc_fid.c
[]
> @@ -63,7 +63,6 @@ static int lprocfs_fid_write_common(const char __user *buffer, size_t count,
>  				    struct lu_seq_range *range)
>  {
>  	struct lu_seq_range tmp;
> -	int rc;
>  	char kernbuf[MAX_FID_RANGE_STRLEN];
>  
>  	LASSERT(range != NULL);
> @@ -82,7 +81,7 @@ static int lprocfs_fid_write_common(const char __user *buffer, size_t count,
>  	}
>  
>  	/* of the form "[0x0000000240000400 - 0x000000028000400]" */
> -	rc = sscanf(kernbuf, "[%llx - %llx]\n",
> +	sscanf(kernbuf, "[%llx - %llx]\n",
>  		    (unsigned long long *)&tmp.lsr_start,
>  		    (unsigned long long *)&tmp.lsr_end);
>  	if (!range_is_sane(&tmp) || range_is_zero(&tmp) ||

Better to make this test use rc rather than
ignore the return from sscanf

	if (rc != 2 || !range_is_sane(etc...))

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