From: David Miller <davem@davemloft.net>
To: viro@ftp.linux.org.uk
Cc: torvalds@osdl.org, clameter@sgi.com, rmk+lkml@arm.linux.org.uk,
dhowells@redhat.com, akpm@osdl.org,
linux-arm-kernel@lists.arm.linux.org.uk,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it
Date: Wed, 06 Dec 2006 17:09:11 -0800 (PST) [thread overview]
Message-ID: <20061206.170911.45496956.davem@davemloft.net> (raw)
In-Reply-To: <20061206190828.GE4587@ftp.linux.org.uk>
From: Al Viro <viro@ftp.linux.org.uk>
Date: Wed, 6 Dec 2006 19:08:28 +0000
> On Wed, Dec 06, 2006 at 11:05:22AM -0800, Linus Torvalds wrote:
> >
> >
> > On Wed, 6 Dec 2006, Christoph Lameter wrote:
> > >
> > > I'd really appreciate a cmpxchg that is generically available for
> > > all arches. It will allow lockless implementation for various performance
> > > criticial portions of the kernel.
> >
> > I suspect ARM may have been the last one without one, no?
>
> No. sparc32 doesn't have one, for instance.
That's correct. It has an atomic swap, but not a cmpxchg.
next prev parent reply other threads:[~2006-12-07 1:09 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-06 16:43 David Howells
2006-12-06 17:21 ` Linus Torvalds
2006-12-06 18:56 ` Christoph Lameter
2006-12-06 19:00 ` Russell King
2006-12-06 19:16 ` Christoph Lameter
2006-12-06 19:28 ` Linus Torvalds
2006-12-06 19:58 ` Russell King
2006-12-06 21:36 ` Matthew Wilcox
2006-12-06 21:52 ` Christoph Lameter
2006-12-06 22:05 ` Matthew Wilcox
2006-12-06 22:15 ` Christoph Lameter
2006-12-07 0:37 ` Roman Zippel
2006-12-07 0:54 ` Linus Torvalds
2006-12-07 1:05 ` Roman Zippel
2006-12-07 1:18 ` Linus Torvalds
2006-12-07 1:24 ` Roman Zippel
2006-12-07 1:36 ` Linus Torvalds
2006-12-07 1:44 ` Matthew Wilcox
2006-12-07 2:09 ` Douglas McNaught
2006-12-07 1:52 ` Roman Zippel
2006-12-07 9:23 ` Nick Piggin
2006-12-06 22:38 ` Linus Torvalds
2006-12-07 9:31 ` Nick Piggin
2006-12-07 13:20 ` Ivan Kokshaysky
2006-12-07 15:03 ` Russell King
2006-12-08 1:18 ` Nick Piggin
2006-12-08 8:56 ` Russell King
2006-12-08 16:06 ` Christoph Lameter
2006-12-08 16:31 ` Russell King
2006-12-08 16:43 ` Christoph Lameter
2006-12-08 16:47 ` Russell King
2006-12-08 16:53 ` Christoph Lameter
2006-12-08 16:58 ` Russell King
2006-12-08 16:56 ` David Howells
2006-12-08 17:06 ` Christoph Lameter
2006-12-08 17:18 ` Russell King
2006-12-08 17:23 ` Christoph Lameter
2006-12-08 19:15 ` Linus Torvalds
2006-12-08 19:31 ` Russell King
2006-12-08 19:37 ` Linus Torvalds
2006-12-08 19:43 ` Russell King
2006-12-08 20:01 ` Linus Torvalds
2006-12-08 18:46 ` Linus Torvalds
2006-12-08 19:04 ` Russell King
2006-12-08 19:35 ` Linus Torvalds
2006-12-08 19:59 ` Russell King
2006-12-08 20:34 ` Linus Torvalds
2006-12-11 11:04 ` David Howells
2006-12-08 22:33 ` Nick Piggin
2006-12-07 15:36 ` Linus Torvalds
2006-12-07 16:51 ` Ralf Baechle
2006-12-07 0:46 ` Ralf Baechle
2006-12-06 19:05 ` Linus Torvalds
2006-12-06 19:08 ` Al Viro
2006-12-06 19:25 ` Linus Torvalds
2006-12-06 19:29 ` Matthew Wilcox
2006-12-06 19:54 ` Linus Torvalds
2006-12-06 19:56 ` Linus Torvalds
2006-12-06 19:43 ` David Howells
2006-12-07 1:09 ` David Miller [this message]
2006-12-06 19:26 ` Matthew Wilcox
2006-12-06 19:29 ` Christoph Lameter
2006-12-06 19:36 ` Matthew Wilcox
2006-12-06 19:47 ` Christoph Lameter
2006-12-06 19:50 ` Matthew Wilcox
2006-12-06 20:11 ` Christoph Lameter
2006-12-06 20:17 ` Matthew Wilcox
2006-12-06 19:34 ` Linus Torvalds
2006-12-06 19:41 ` Matthew Wilcox
2006-12-06 19:45 ` David Howells
2006-12-06 20:00 ` Russell King
2006-12-07 15:06 ` Russell King
2006-12-08 15:32 ` Russell King
2006-12-06 19:12 ` Lennert Buytenhek
2006-12-06 19:47 ` David Howells
2006-12-06 20:09 ` Lennert Buytenhek
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=20061206.170911.45496956.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=akpm@osdl.org \
--cc=clameter@sgi.com \
--cc=dhowells@redhat.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.arm.linux.org.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=rmk+lkml@arm.linux.org.uk \
--cc=torvalds@osdl.org \
--cc=viro@ftp.linux.org.uk \
/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
Powered by JetHome