From: yong.zhang0@gmail.com (Yong Zhang)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH] ARM: cmpxchg: define __HAVE_ARCH_CMPXCHG for armv6 and later
Date: Thu, 31 May 2012 20:50:12 +0800 [thread overview]
Message-ID: <20120531125012.GA3741@zhy> (raw)
In-Reply-To: <20120531012450.GA8506@mudshark.cambridge.arm.com>
On Thu, May 31, 2012 at 02:24:50AM +0100, Will Deacon wrote:
> Hello,
>
> On Wed, May 30, 2012 at 08:51:26AM +0100, Yong Zhang wrote:
> > diff --git a/arch/arm/include/asm/cmpxchg.h b/arch/arm/include/asm/cmpxchg.h
> > index 7eb18c1..a91b44e 100644
> > --- a/arch/arm/include/asm/cmpxchg.h
> > +++ b/arch/arm/include/asm/cmpxchg.h
> > @@ -127,6 +127,8 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
> >
> > #else /* min ARCH >= ARMv6 */
> >
> > +#define __HAVE_ARCH_CMPXCHG 1
> > +
> > extern void __bad_cmpxchg(volatile void *ptr, int size);
>
> As long as this only requires 4-byte cmpxchg support then I think this is
> fine. It looks like that's currently the case, so:
Yes and thanks for review.
Yong
>
> Acked-by: Will Deacon <will.deacon@arm.com>
>
> Will
prev parent reply other threads:[~2012-05-31 12:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-30 7:51 [RFC PATCH] ARM: cmpxchg: define __HAVE_ARCH_CMPXCHG for armv6 and later Yong Zhang
2012-05-31 1:24 ` Will Deacon
2012-05-31 12:50 ` Yong Zhang [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120531125012.GA3741@zhy \
--to=yong.zhang0@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).