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 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.