linux-kernel - Re: [PATCH 08/12] IB/ehca: Replace get_paca()->paca_index by the more portable smp_processor

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Date:	Wed, 12 Sep 2007 16:42:50 +0200
From:	Joachim Fenkes <fenkes@...ibm.com>
To:	Nathan Lynch <ntl@...ox.com>
Cc:	LinuxPPC-Dev <linuxppc-dev@...abs.org>,
	LKML <linux-kernel@...r.kernel.org>,
	OF-General <general@...ts.openfabrics.org>,
	Roland Dreier <rolandd@...co.com>,
	OF-EWG <ewg@...ts.openfabrics.org>,
	Stefan Roscher <stefan.roscher@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>
Subject: Re: [PATCH 08/12] IB/ehca: Replace get_paca()->paca_index by the more portable smp_processor_id()

On Tuesday 11 September 2007 16:51, Nathan Lynch wrote:

> > -				   get_paca()->paca_index, __FUNCTION__, \
> > +				   smp_processor_id(), __FUNCTION__, \
> 
> I think I see these macros used in preemptible code (e.g. ehca_probe),
> where smp_processor_id() will print a warning when
> CONFIG_DEBUG_PREEMPT=y.  Probably better to use raw_smp_processor_id.

You're right, man. The processor id doesn't need to be preemption-safe in this
context, so that would be a bogus warning. Thanks for pointing this out. I'll
post a new version of this patch.

Joachim

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