From: David Brownell <david-b@pacbell.net>
To: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Richard Purdie <rpurdie@rpsys.net>, linux-kernel@vger.kernel.org
Subject: Re: use of preempt_count instead of in_atomic() at leds-gpio.c
Date: Sun, 16 Mar 2008 11:46:23 -0800 [thread overview]
Message-ID: <200803161246.23909.david-b@pacbell.net> (raw)
In-Reply-To: <20080316184349.GA28543@khazad-dum.debian.net>
On Sunday 16 March 2008, Henrique de Moraes Holschuh wrote:
> Is the use of "if (preempt_count())" to know when to defer led gpio work to
> a workqueue needed? Shouldn't "if (in_atomic())" be enough?
At this point, I don't know of any such reason.
I remember hunting for the right heuristic, and settling on
that one for reasons that I can't recall now. They may even
be no longer applicable.
next prev parent reply other threads:[~2008-03-16 19:46 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-16 18:43 use of preempt_count instead of in_atomic() at leds-gpio.c Henrique de Moraes Holschuh
2008-03-16 19:46 ` David Brownell [this message]
2008-03-18 7:14 ` Andrew Morton
2008-03-18 19:06 ` David Brownell
2008-03-18 20:07 ` Andrew Morton
2008-03-20 22:56 ` Henrique de Moraes Holschuh
2008-03-20 23:47 ` Andrew Morton
2008-03-21 0:36 ` Henrique de Moraes Holschuh
2008-03-21 1:08 ` Andrew Morton
2008-03-21 1:31 ` Alan Stern
2008-03-21 1:31 ` Alan Stern
2008-03-21 1:36 ` Michael Buesch
2008-03-21 1:36 ` Michael Buesch
2008-03-21 2:27 ` Andrew Morton
2008-03-21 2:27 ` Andrew Morton
2008-03-21 3:07 ` Alan Stern
2008-03-21 3:07 ` Alan Stern
2008-03-21 3:17 ` Andrew Morton
2008-03-21 3:17 ` Andrew Morton
2008-03-21 9:53 ` Jean Delvare
2008-03-21 17:37 ` Andrew Morton
2008-03-21 18:05 ` Alan Stern
2008-03-24 19:34 ` Jonathan Corbet
2008-03-24 19:42 ` Andrew Morton
2008-03-24 19:53 ` Jonathan Corbet
2008-03-25 8:52 ` Junio C Hamano
2008-03-25 10:39 ` Jean Delvare
2008-03-25 13:44 ` Jonathan Corbet
2008-03-25 23:20 ` David Brownell
2008-03-26 14:28 ` Alan Stern
2008-03-26 16:17 ` Henrique de Moraes Holschuh
2008-03-26 16:46 ` Richard Purdie
2008-03-27 18:51 ` David Brownell
2008-03-21 15:11 ` Tetsuo Handa
2008-03-21 16:54 ` Stefan Richter
2008-03-21 17:02 ` Stefan Richter
2008-03-23 5:53 ` Tetsuo Handa
2008-03-21 13:47 ` Heiko Carstens
2008-03-21 13:47 ` Heiko Carstens
2008-03-21 16:54 ` Greg KH
2008-03-21 16:54 ` Greg KH
2008-03-21 19:59 ` Andrew Morton
2008-03-21 19:59 ` Andrew Morton
2008-03-21 20:16 ` Michael Buesch
2008-03-21 20:16 ` Michael Buesch
2008-03-21 20:20 ` Michael Buesch
2008-03-21 20:20 ` Michael Buesch
2008-03-21 9:21 ` Stefan Richter
2008-03-21 9:21 ` Stefan Richter
2008-03-21 9:27 ` Stefan Richter
2008-03-21 9:27 ` Stefan Richter
2008-03-21 12:37 ` Henrique de Moraes Holschuh
2008-03-21 12:37 ` Henrique de Moraes Holschuh
2008-03-21 13:16 ` Stefan Richter
2008-03-22 11:29 ` Stefan Richter
2008-03-22 11:29 ` Stefan Richter
[not found] ` <20080320180802.426ad2d1.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2008-03-21 15:42 ` Use of in_atomic in i2c_transfer (Was: use of preempt_count instead of in_atomic() at leds-gpio.c) Jean Delvare
[not found] ` <20080321164235.26c95e17-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2008-03-21 16:00 ` Russell King - ARM Linux
2008-03-21 17:04 ` use of preempt_count instead of in_atomic() at leds-gpio.c David Brownell
2008-03-21 17:04 ` David Brownell
2008-03-21 17:04 ` David Brownell
2008-03-21 0:56 ` Richard Purdie
2008-03-21 2:10 ` Henrique de Moraes Holschuh
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=200803161246.23909.david-b@pacbell.net \
--to=david-b@pacbell.net \
--cc=hmh@hmh.eng.br \
--cc=linux-kernel@vger.kernel.org \
--cc=rpurdie@rpsys.net \
/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.