linux-kernel - Re: [PATCH 01/15] kobject: Replace ALL occurrences of '/' with '!' instead of only the first one.

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Message-ID: <20080822124153.GF16680@sci.fi>
Date:	Fri, 22 Aug 2008 15:41:53 +0300
From:	Ville Syrjälä <syrjala@....fi>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, Ingo Oeser <ioe-lkml@...eria.de>,
	Kay Sievers <kay.sievers@...y.org>
Subject: Re: [PATCH 01/15] kobject: Replace ALL occurrences of '/' with '!'
	instead of only the first one.

On Thu, Aug 21, 2008 at 10:32:49AM -0700, Greg Kroah-Hartman wrote:
> From: Ingo Oeser <ioe-lkml@...eria.de>
> 
> A recent patch from Kay Sievers <kay.sievers@...y.org>
> replaced the first occurrence of '/' with '!' as needed for block devices.
> 
> Now do some cheap defensive coding and replace all of them to avoid future
> issues in this area.
> 
> Signed-off-by: Ingo Oeser <ioe-lkml@...eria.de>
> Cc: Kay Sievers <kay.sievers@...y.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> ---
>  lib/kobject.c |    3 +--
>  1 files changed, 1 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/kobject.c b/lib/kobject.c
> index bd732ff..fbf0ae2 100644
> --- a/lib/kobject.c
> +++ b/lib/kobject.c
> @@ -223,8 +223,7 @@ static int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
>  		return -ENOMEM;
>  
>  	/* ewww... some of these buggers have '/' in the name ... */
> -	s = strchr(kobj->name, '/');
> -	if (s)
> +	while ((s = strchr(kobj->name, '/')))
>  		s[0] = '!';

That's somewhat inefficient. How about this?

s = kobj->name;
while ((s = strchr(s, '/')))
	*s++ = '!';

-- 
Ville Syrjälä
syrjala@....fi
http://www.sci.fi/~syrjala/
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