linux-kernel - Re: [PATCH] asm-generic/io.h: remove asm/cacheflush.h include

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Date:	Thu, 25 Oct 2012 15:40:16 +0200
From:	Jonas Bonn <jonas@...thpole.se>
To:	James Hogan <james.hogan@...tec.com>
Cc:	Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
	linux@...ts.openrisc.net, linux-kernel@...r.kernel.org,
	uclinux-dist-devel@...ckfin.uclinux.org,
	linux-xtensa@...ux-xtensa.org, Chris Zankel <chris@...kel.net>,
	Max Filippov <jcmvbkbc@...il.com>,
	Mike Frysinger <vapier@...too.org>,
	Chen Liqin <liqin.chen@...plusct.com>,
	Lennox Wu <lennox.wu@...il.com>,
	Guan Xuetao <gxt@...c.pku.edu.cn>
Subject: Re: [PATCH] asm-generic/io.h: remove asm/cacheflush.h include

On Tue, 2012-10-23 at 10:21 +0100, James Hogan wrote:
> Including <asm/cacheflush.h> from <asm-generic/io.h> prevents
> cacheflush.h being able to use I/O functions like readl and writel due
> to circular include dependencies. It doesn't appear as if anything from
> cacheflush.h is actually used by the generic io.h, so remove the
> include.
> 
> I've compile tested a defconfig compilation of blackfin, openrisc (which
> needed <asm/pgtable.h> including from it's <asm/io.h> to get the PAGE_*
> definitions), and xtensa.
> 
> Other architectures which use asm-generic/io.h are score and unicore32,
> and looking at their io.h I don't see any obvious problems.

Acked-by: Jonas Bonn <jonas@...thpole.se> for OpenRISC

Who's tree should this go via.  I can take it via the openrisc tree, but
it would be good to get some Ack's that this isn't going to break things
for the other arch's (in particular score and unicore32, since they are
untested).

/Jonas

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