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

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Message-ID: <CAH2Cfb_ZQiHiL2pGCB4j2a3U60=78w6a9if_Z+pgk2qEi+8pZQ@mail.gmail.com>
Date:   Wed, 13 Feb 2019 03:09:19 +0800
From:   xiang xiao <xiaoxiang781216@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     alexander.shishkin@...ux.intel.com,
        andriy.shevchenko@...ux.intel.com, linux-kernel@...r.kernel.org,
        Xiang Xiao <xiaoxiang@...omi.com>
Subject: Re: [PATCH] lib/string: add memrchr function

On Wed, Feb 13, 2019 at 2:34 AM Greg KH <gregkh@...uxfoundation.org> wrote:
>
> On Wed, Feb 13, 2019 at 02:06:49AM +0800, Xiang Xiao wrote:
> > Here is the detailed description for memrchr:
> > https://linux.die.net/man/3/memrchr
>
> Please put it in the changelog, as web pages move and go away :(

Sure.

>
> >
> > Signed-off-by: Xiang Xiao <xiaoxiang@...omi.com>
> > ---
> >  include/linux/string.h |  1 +
> >  lib/string.c           | 21 +++++++++++++++++++++
> >  2 files changed, 22 insertions(+)
> >
> > diff --git a/include/linux/string.h b/include/linux/string.h
> > index 7927b87..f380f4b 100644
> > --- a/include/linux/string.h
> > +++ b/include/linux/string.h
> > @@ -167,6 +167,7 @@ static inline void memcpy_flushcache(void *dst, const void *src, size_t cnt)
> >       memcpy(dst, src, cnt);
> >  }
> >  #endif
> > +void *memrchr(const void *s, int c, size_t n);
>
> Who is going to use this?

This patch will use memrchr:
https://github.com/thesofproject/linux/pull/177/commits/a0b7009fede5552dc98733f2996a8140bff62455
I am preparing to upstream it.

>
> thanks,
>
> greg k-h