From: Joe Perches <joe@perches.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Akinobu Mita <akinobu.mita@gmail.com>,
nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/5] lib: introduce call_once()
Date: Tue, 11 Mar 2008 11:56:55 -0700 [thread overview]
Message-ID: <1205261815.3165.21.camel@localhost> (raw)
In-Reply-To: <20080311103517.5b6dc23f.akpm@linux-foundation.org>
On Tue, 2008-03-11 at 10:35 -0700, Andrew Morton wrote:
> #define ONCE() \
> ({ \
> static long flag; \
> \
> return !test_and_set_bit(0, flag); \
> })
test_and_set_bit takes an address
Perhaps:
#define DO_ONCE(x) \
({ static long flag; if (test_and_set_bit(0, &flag)) x; 1; })
DO_ONCE(foo);
next prev parent reply other threads:[~2008-03-11 18:59 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-10 14:57 [PATCH 1/5] lib: introduce call_once() Akinobu Mita
2008-03-10 15:00 ` [PATCH 2/5] idr: use call_once() Akinobu Mita
2008-03-10 15:01 ` [PATCH 3/5] hugetlbfs: " Akinobu Mita
2008-03-10 15:03 ` [PATCH 4/5] shmem: " Akinobu Mita
2008-03-10 15:05 ` [PATCH 5/5] tiny-shmem: " Akinobu Mita
2008-03-10 22:15 ` [PATCH 4/5] shmem: " Hugh Dickins
2008-03-11 12:29 ` Akinobu Mita
2008-03-11 13:41 ` Hugh Dickins
2008-03-10 15:29 ` [PATCH 1/5] lib: introduce call_once() Joe Perches
2008-03-11 12:17 ` Akinobu Mita
2008-03-11 3:48 ` Andrew Morton
2008-03-11 4:10 ` Nick Piggin
2008-03-11 4:21 ` Andrew Morton
2008-03-11 12:27 ` Akinobu Mita
2008-03-11 17:35 ` Andrew Morton
2008-03-11 18:56 ` Joe Perches [this message]
2008-03-11 19:11 ` Andrew Morton
2008-03-15 4:01 ` Akinobu Mita
2008-03-11 12:41 ` Nick Piggin
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=1205261815.3165.21.camel@localhost \
--to=joe@perches.com \
--cc=akinobu.mita@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=nickpiggin@yahoo.com.au \
/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