linux-kernel - Re: 2.6.23-rc1-mm1 -- mostly fails to build

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Message-ID: <20070725170427.GA26343@uranus.ravnborg.org>
Date:	Wed, 25 Jul 2007 19:04:27 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Andy Whitcroft <apw@...dowen.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Steve Fox <drfickle@...ibm.com>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: 2.6.23-rc1-mm1 -- mostly fails to build

On Wed, Jul 25, 2007 at 05:36:56PM +0100, Andy Whitcroft wrote:
> ia64 (elm3b10):
> 
>   LD      vmlinux.o
> ld: dynreloc miscount for kernel/built-in.o, section .opd
> ld: can not edit opd Bad value
> make: *** [vmlinux.o] Error 1

On powerpc we had something similar. It was a binutils bug
(see: http://article.gmane.org/gmane.comp.gnu.binutils/33650)

I tracked it down to be fixed by the following:

diff --git a/include/linux/mm.h b/include/linux/mm.h
index c456c3a..2ea222f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1246,7 +1246,7 @@ void drop_slab(void);
 extern int randomize_va_space;
 #endif
 
-__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma);
+//__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma);
 
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */



This is obviously just a quick hack and I used brutal force
to find out how to fix it - but does not yet understand why this
weak prototype cause the bug.

	Sam
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