linux-kernel - Re: [PATCH linux-phy v2 1/4] string.h: Add str_has_proper

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Date:   Thu, 18 Aug 2022 22:10:58 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Marek Behún <kabel@...nel.org>
Cc:     Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Linux Phy <linux-phy@...ts.infradead.org>,
        Kees Cook <keescook@...omium.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Pali Rohár <pali@...nel.org>,
        josef.schlehofer@....cz
Subject: Re: [PATCH linux-phy v2 1/4] string.h: Add str_has_proper_prefix()

On Wed, Aug 17, 2022 at 11:06 PM Marek Behún <kabel@...nel.org> wrote:
>
> Add str_has_proper_prefix(), similar to str_has_prefix(), but requires
> that the prefix is proper: the string itself must be longer than the
> prefix.
>
> Signed-off-by: Marek Behún <kabel@...nel.org>
> ---
> Andy, Kees, could you ack this if it is ok?

Seems to me there are too many strlen():s. One is hidden in strncmp().

Besides not the good naming (what 'proper' means), the entire function
is not needed. You may simply call

  str_has_prefix() && p[len] != '\0';

Correct?

-- 
With Best Regards,
Andy Shevchenko