From: Scott Wood <scottwood@freescale.com>
To: Vitaly Bordug <vitb@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [RFC/PATCH] powerpc: Move CPM command handling into the cpm drivers
Date: Mon, 26 Nov 2007 10:24:46 -0600 [thread overview]
Message-ID: <20071126162446.GA4408@loki.buserror.net> (raw)
In-Reply-To: <20071123005121.4d38d877@kernel.crashing.org>
On Fri, Nov 23, 2007 at 12:51:21AM +0300, Vitaly Bordug wrote:
> Even that might be not enough - we may have simultaneous call of this func
> in non-smp case...
Do you really think that every piece of code that uses spinlocks in the
kernel is broken on non-SMP?
> I was thinking of some kind of refcount, so one that is going to issue CPM
> command, must do say pq_cpmp_get() and another driver won't be able to
> mangle with cpcr while it's not done with previous request.
How on earth are you going to effect mutual exclusion using reference
counting?
-Scott
next prev parent reply other threads:[~2007-11-26 16:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-22 17:24 [RFC/PATCH] powerpc: Move CPM command handling into the cpm drivers Jochen Friedrich
2007-11-22 18:36 ` Grant Likely
2007-11-22 21:51 ` Vitaly Bordug
2007-11-24 17:53 ` Jochen Friedrich
2007-11-24 21:47 ` Vitaly Bordug
2007-11-26 16:24 ` Scott Wood [this message]
2007-11-26 21:22 ` Vitaly Bordug
2007-11-26 21:41 ` Scott Wood
2007-11-27 8:08 ` Vitaly Bordug
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