linux-kernel - Re: [PATCH 1/1] kernel/res_counter.c: replace simple

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Message-Id: <20140507153403.3cbcbf2de848b1c0c8f332d2@linux-foundation.org>
Date:	Wed, 7 May 2014 15:34:03 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Michal Hocko <mhocko@...e.cz>
Subject: Re: [PATCH 1/1] kernel/res_counter.c: replace simple_strtoull by
 kstrtoull

On Wed, 7 May 2014 22:37:32 +0200 Fabian Frederick <fabf@...net.be> wrote:

> --- a/kernel/res_counter.c
> +++ b/kernel/res_counter.c
> @@ -183,11 +183,12 @@ int res_counter_memparse_write_strategy(const char *buf,
>  {
>  	char *end;
>  	unsigned long long res;
> +	int rc;
>  
>  	/* return RES_COUNTER_MAX(unlimited) if "-1" is specified */
>  	if (*buf == '-') {
> -		res = simple_strtoull(buf + 1, &end, 10);
> -		if (res != 1 || *end != '\0')
> +		rc = kstrtoull(buf + 1, 10, &res);

There's no need to give `rc' function-wide scope.

		int rc = kstrtoull(buf + 1, 10, &res);

will work here.

> +		if ((res != 1) || (rc))

And that's over-parenthesized.

>  			return -EINVAL;
>  		*resp = RES_COUNTER_MAX;
>  		return 0;

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