linux-kernel - RE: [PATCH v2 3/3] kobject: Use return value of strreplace()

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Message-ID: <55ddb6da555a408da801f56577845a09@AcuMS.aculab.com>
Date:   Sun, 26 Mar 2023 13:37:37 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Andy Shevchenko' <andriy.shevchenko@...ux.intel.com>,
        Kees Cook <keescook@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Theodore Ts'o <tytso@....edu>, Jan Kara <jack@...e.com>,
        Andy Shevchenko <andy@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: RE: [PATCH v2 3/3] kobject: Use return value of strreplace()

From: Andy Shevchenko
> Sent: 23 March 2023 12:37
>
> Since strreplace() returns the pointer to the string itself,
> we may use it directly in the code.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  lib/kobject.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/lib/kobject.c b/lib/kobject.c
> index f79a434e1231..16d530f9c174 100644
> --- a/lib/kobject.c
> +++ b/lib/kobject.c
> @@ -281,8 +281,7 @@ int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
>  		kfree_const(s);
>  		if (!t)
>  			return -ENOMEM;
> -		strreplace(t, '/', '!');
> -		s = t;
> +		s = strreplace(t, '/', '!');

Why do this? It just makes the code harder to read because
you have to know another 'silly fact' about a function.

Possibly useful return values might be:
1) The address of the first changed character.
2) The address of the last changed characher.
3) The '\0' terminator.
4) void.

	David

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