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be no longer applicable.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: 45+ 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 1:36 ` Michael Buesch
2008-03-21 2:27 ` Andrew Morton
2008-03-21 3:07 ` Alan Stern
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 16:54 ` Greg KH
2008-03-21 19:59 ` Andrew Morton
2008-03-21 20:16 ` Michael Buesch
2008-03-21 20:20 ` Michael Buesch
2008-03-21 9:21 ` Stefan Richter
2008-03-21 9:27 ` Stefan Richter
2008-03-21 12:37 ` Henrique de Moraes Holschuh
2008-03-21 13:16 ` Stefan Richter
2008-03-22 11:29 ` Stefan Richter
2008-03-21 17:04 ` David Brownell
2008-03-21 0:56 ` Richard Purdie
2008-03-21 2:10 ` Henrique de Moraes Holschuh
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