From: Michael Schnell <mschnell@lumino.de>
To: "Leonidas ." <leonidas137@gmail.com>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>,
Noah Watkins <noah@noahdesu.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Difference between atomic operations and memory barriers
Date: Tue, 27 Oct 2009 11:21:12 +0100 [thread overview]
Message-ID: <4AE6C998.9040405@lumino.de> (raw)
In-Reply-To: <f22d86810910261205r232db5d4re97a54827c7adab3@mail.gmail.com>
Leonidas . wrote:
>
> any_t *ptr = something;
>
> is always atomic even on SMPs without using locks, barriers then my
> doubt is cleared. Thanks.
I assume that this only holds if the pointer (not the thing it points
to) is denoted as volatile.
-Michael
next prev parent reply other threads:[~2009-10-27 10:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-26 17:19 Difference between atomic operations and memory barriers Leonidas .
[not found] ` <7ADB5FD7-9C97-4987-BC20-997258B25FD2@noahdesu.com>
2009-10-26 18:22 ` Leonidas .
2009-10-26 18:54 ` Chris Friesen
2009-10-26 19:00 ` Leonidas .
2009-10-26 19:07 ` Noah Watkins
2009-10-26 19:34 ` Stefan Richter
2009-10-26 19:42 ` Noah Watkins
2009-10-27 11:51 ` Valdis.Kletnieks
2009-10-28 10:00 ` Boaz Harrosh
2009-10-28 13:26 ` Valdis.Kletnieks
2009-10-26 19:00 ` Stefan Richter
2009-10-26 19:05 ` Leonidas .
2009-10-27 10:21 ` Michael Schnell [this message]
2009-10-27 10:23 ` Leonidas .
2009-10-27 11:01 ` Michael Schnell
2009-10-27 14:57 ` Stefan Richter
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=4AE6C998.9040405@lumino.de \
--to=mschnell@lumino.de \
--cc=leonidas137@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=noah@noahdesu.com \
--cc=stefanr@s5r6.in-berlin.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.