From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Roman Zippel <zippel@linux-m68k.org>,
Linux Kernel Mailing List <Linux-Kernel@vger.kernel.org>,
Dipankar Sarma <dipankar@in.ibm.com>
Subject: Re: [PATCH 2/5] atomic: introduce atomic_inc_not_zero
Date: Thu, 15 Sep 2005 11:51:24 +1000 [thread overview]
Message-ID: <4328D39C.2040500@yahoo.com.au> (raw)
In-Reply-To: <20050914232106.H30746@flint.arm.linux.org.uk>
Russell King wrote:
> The whole point about architecture specific includes is not to provide
> a frenzied feeding ground for folk who like to "clean code up" but to
> allow architectures to do things in the most efficient way for them
> without polluting the kernel too much.
>
> It seems that aspect is being lost sight of here.
>
Yep. We've got atomic_add, atomic_sub, atomic_inc, atomic_dec,
atomic_inc_return, atomic_add_return, atomic_dec_return, atomic_sub_return
to start with.
Not only that, but we can probably emulate all the atomic_ operations
with atomic_cmpxchg, not just atomic_inc_not_zero.
Roman: any ideas about what you would prefer? You'll notice
atomic_inc_not_zero replaces rcuref_inc_lf, which is used several times
in the VFS.
Thanks,
Nick
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2005-09-15 1:51 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-14 14:48 [PATCH 1/5] atomic: introduce atomic_cmpxchg Nick Piggin
2005-09-14 14:49 ` [PATCH 2/5] atomic: introduce atomic_inc_not_zero Nick Piggin
2005-09-14 14:51 ` [PATCH 3/5] rcu file: use atomic primitives Nick Piggin
2005-09-14 14:55 ` [PATCH 4/5] atomic: dec_and_lock use cmpxchg Nick Piggin
2005-09-14 15:01 ` [PATCH 5/5] remove HAVE_ARCH_CMPXCHG Nick Piggin
2005-09-14 16:31 ` Roman Zippel
2005-09-14 16:49 ` Nick Piggin
2005-09-14 17:59 ` David S. Miller
2005-09-14 22:03 ` Russell King
2005-09-14 22:26 ` David S. Miller
2005-09-15 7:10 ` Russell King
2005-09-15 13:08 ` Alan Cox
2005-09-14 15:20 ` [PATCH 4/5] atomic: dec_and_lock use cmpxchg Nick Piggin
2005-09-14 16:24 ` David S. Miller
2005-09-14 16:52 ` Nick Piggin
2005-09-17 0:05 ` David S. Miller
2005-09-14 16:16 ` [PATCH 2/5] atomic: introduce atomic_inc_not_zero Roman Zippel
2005-09-14 16:44 ` Nick Piggin
2005-09-14 17:04 ` Nick Piggin
2005-09-14 17:18 ` Roman Zippel
2005-09-14 22:00 ` Russell King
2005-09-14 22:10 ` Roman Zippel
2005-09-14 22:21 ` Russell King
2005-09-15 1:51 ` Nick Piggin [this message]
2005-09-17 1:15 ` Roman Zippel
2005-09-17 6:36 ` Andrew Morton
2005-09-17 10:01 ` Roman Zippel
2005-09-17 7:19 ` David S. Miller
2005-09-17 7:34 ` Dipankar Sarma
2005-09-18 8:08 ` Nick Piggin
2005-09-17 0:59 ` Roman Zippel
2005-09-17 7:18 ` David S. Miller
2005-09-17 7:27 ` Russell King
2005-09-18 6:03 ` David S. Miller
2005-09-14 15:17 ` [PATCH 1/5] atomic: introduce atomic_cmpxchg Russell King
2005-09-14 15:22 ` 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=4328D39C.2040500@yahoo.com.au \
--to=nickpiggin@yahoo.com.au \
--cc=Linux-Kernel@vger.kernel.org \
--cc=dipankar@in.ibm.com \
--cc=rmk+lkml@arm.linux.org.uk \
--cc=zippel@linux-m68k.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