From: Timur Tabi <timur@freescale.com>
To: Jon Smirl <jonsmirl@gmail.com>
Cc: linuxppc-dev@ozlabs.org, alsa-devel@alsa-project.org,
broonie@sirena.org.uk
Subject: Re: [alsa-devel] [PATCH] Modify mpc5200 AC97 driver to use V9 of spin_event_timeout()
Date: Tue, 26 May 2009 22:12:32 -0500 [thread overview]
Message-ID: <ed82fe3e0905262012r58f8a750lab9cb1bf3b9a989@mail.gmail.com> (raw)
In-Reply-To: <9e4733910905261801p130f50afie2c50d5723192d44@mail.gmail.com>
On Tue, May 26, 2009 at 8:01 PM, Jon Smirl <jonsmirl@gmail.com> wrote:
> Then why did you need to make your routine that calls cpu_relax()?
That gets called only if delay == 0. udelay(0) is a no-op, so if the
caller specifies no delay, then I need to manually call cpu_relax().
> I don't know what goes on in the guts of HMT_low() and cpu_relax(),
> when you guys decide which one I should use let me know and I can
> adjust the patch.
Grant, I don't see any reason why "udelay(50)" is unacceptable.
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2009-05-27 3:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-27 0:25 [PATCH] Modify mpc5200 AC97 driver to use V9 of spin_event_timeout() Jon Smirl
2009-05-27 0:38 ` [alsa-devel] " Timur Tabi
2009-05-27 0:44 ` Jon Smirl
2009-05-27 0:53 ` Timur Tabi
2009-05-27 1:01 ` Jon Smirl
2009-05-27 3:12 ` Timur Tabi [this message]
2009-05-27 3:49 ` Grant Likely
2009-05-27 3:48 ` Grant Likely
2009-05-27 4:00 ` Grant Likely
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