linux-kernel - RE: [-mm Patch] uml: fix a building error

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Message-ID: <924EFEDD5F540B4284297C4DC59F3DEE62B45A@orsmsx423.amr.corp.intel.com>
Date:	Thu, 17 Jan 2008 15:17:38 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	"Jeff Dike" <jdike@...toit.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Mariusz Kozlowski" <m.kozlowski@...land.pl>,
	"WANG Cong" <xiyou.wangcong@...il.com>,
	<linux-kernel@...r.kernel.org>,
	<user-mode-linux-devel@...ts.sourceforge.net>,
	"David Miller" <davem@...emloft.net>, <sparclinux@...r.kernel.org>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>
Subject: RE: [-mm Patch] uml: fix a building error

 

>-----Original Message-----
>From: Jeff Dike [mailto:jdike@...toit.com] 
>Sent: Thursday, January 17, 2008 3:08 PM
>To: Pallipadi, Venkatesh
>Cc: Andrew Morton; Mariusz Kozlowski; WANG Cong; 
>linux-kernel@...r.kernel.org; 
>user-mode-linux-devel@...ts.sourceforge.net; David Miller; 
>sparclinux@...r.kernel.org; Ingo Molnar; Thomas Gleixner
>Subject: Re: [-mm Patch] uml: fix a building error
>
>On Thu, Jan 17, 2008 at 01:41:50PM -0800, Venki Pallipadi wrote:
>> > And while we're on the subject, what's the deal with these, in
>> > include/asm-x86/io.h?
>> > 
>> > #define ioremap_wc ioremap_wc
>> > #define unxlate_dev_mem_ptr unxlate_dev_mem_ptr
>> > 
>> 
>> If archs want to override the defaults for these two 
>functions, they define
>> the above and then include asm-generic/iomap.h.
>
>That wasn't really the question.
>
>#define X X
>
>is a no-op, yes?
>

Later there is code in generic.h which is doing
#ifndef ioremap_wc
#define ioremap_wc ioremap_nocache
#endif
	

Thanks,
Venki
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