linux-kernel - Re: [patch] parisc, iommu: add missing include for prefetchw()

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Date:	Sat, 15 Oct 2011 18:48:19 -0500
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [patch] parisc, iommu: add missing include for prefetchw()

On Sat, 2011-10-15 at 15:38 -0700, David Rientjes wrote:
> prefetchw() requires it to be defined by linux/prefetch.h, or it results
> in a compile error:
> 
> In file included from drivers/parisc/sba_iommu.c:916:0:
> drivers/parisc/iommu-helpers.h: In function 'iommu_fill_pdir':
> drivers/parisc/iommu-helpers.h:62:4: error: implicit declaration of function 'prefetchw'
> 
> Include linux/prefetch.h.

This isn't physically possible on the parisc platform: prefetch.h is
included by processor.h which, amongst other things, goes into
spinlock.h which is above this file in sba_iommu.c

How did you try to compile this file?

James


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