linux-kernel - Re: [v2] lib/string: add memrchr function

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Message-ID: <20190212191133.GA22246@kroah.com>
Date:   Tue, 12 Feb 2019 20:11:33 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Xiang Xiao <xiaoxiang781216@...il.com>
Cc:     alexander.shishkin@...ux.intel.com,
        andriy.shevchenko@...ux.intel.com, linux-kernel@...r.kernel.org,
        Xiang Xiao <xiaoxiang@...omi.com>
Subject: Re: [v2] lib/string: add memrchr function

On Wed, Feb 13, 2019 at 02:54:43AM +0800, Xiang Xiao wrote:
> Here is the detailed description for memrchr:
> 
> void *memrchr(const void *s, int c, size_t n);
> 
> The memrchr() function is like the memchr() function, except
> that it searches backward from the end of the n bytes pointed
> to by s instead of forward from the beginning.
> 
> The memrchr() functions return a pointer to the matching byte
> or NULL if the character does not occur in the given memory
> area.
> 
> Signed-off-by: Xiang Xiao <xiaoxiang@...omi.com>
> ---
>  include/linux/string.h |  1 +
>  lib/string.c           | 21 +++++++++++++++++++++
>  2 files changed, 22 insertions(+)

Don't add new apis without any users.

thanks,

greg k-h