linux-kernel - Re: 2.6.18-rc5-mm1: MMU=n compile error

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Message-Id: <1157355872.14324.6.camel@twins>
Date:	Mon, 04 Sep 2006 09:44:32 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Hugh Dickins <hugh@...itas.com>
Subject: Re: 2.6.18-rc5-mm1: MMU=n compile error

On Mon, 2006-09-04 at 00:17 +0200, Adrian Bunk wrote:
> mm-tracking-shared-dirty-pages.patch breaks CONFIG_MMU=n architectures:
> 
> <--  snip  -->
> 
> ....
>   CC      mm/page-writeback.o
> /home/bunk/linux/kernel-2.6/linux-2.6.18-rc5-mm1/mm/page-writeback.c: In function 'test_clear_page_dirty':
> /home/bunk/linux/kernel-2.6/linux-2.6.18-rc5-mm1/mm/page-writeback.c:867: error: implicit declaration of function 'page_mkclean'
> make[2]: *** [mm/page-writeback.o] Error 1

This might fix it, but I don't have a cross compiler for any nommu arch,
nor an emulator so I can't test. - Will try to build me a toolchain but
this could take some time.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
 include/linux/rmap.h |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-mm/include/linux/rmap.h
===================================================================
--- linux-mm.orig/include/linux/rmap.h	2006-09-04 08:31:57.000000000 +0200
+++ linux-mm/include/linux/rmap.h	2006-09-04 08:33:44.000000000 +0200
@@ -120,6 +120,8 @@ int page_mkclean(struct page *);
 #define page_referenced(page,l) TestClearPageReferenced(page)
 #define try_to_unmap(page, refs) SWAP_FAIL
 
+#define page_mkclean(page)	(0)
+
 #endif	/* CONFIG_MMU */
 
 /*



-- 
VGER BF report: H 0.393012
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