linux-kernel - Re: [RFC/PATCH 4/8] lib/kobject.c: Use strreplace

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Date:	Thu, 4 Jun 2015 23:31:43 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC/PATCH 4/8] lib/kobject.c: Use strreplace

On Thu, Jun 04, 2015 at 11:37:11AM +0200, Rasmus Villemoes wrote:
> There's probably not many slashes in kobj->name, but starting over
> when we see one feels wrong.
> 
> Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
> ---
>  lib/kobject.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/lib/kobject.c b/lib/kobject.c
> index 3b841b97fccd..597d962d3d4d 100644
> --- a/lib/kobject.c
> +++ b/lib/kobject.c
> @@ -258,7 +258,6 @@ int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
>  				  va_list vargs)
>  {
>  	const char *old_name = kobj->name;
> -	char *s;
>  
>  	if (kobj->name && !fmt)
>  		return 0;
> @@ -270,8 +269,7 @@ int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
>  	}
>  
>  	/* ewww... some of these buggers have '/' in the name ... */
> -	while ((s = strchr(kobj->name, '/')))
> -		s[0] = '!';
> +	strreplace((char *)kobj->name, '/', '!');

Again, I'd rather do
        s = kvasprintf(GFP_KERNEL, fmt, vargs);
        if (!s)
                return -ENOMEM;
	strreplace(s, '/', '!');
	old_name = kobj->name;
	kobj->name = s;
	kfree(old_name);
--
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