linux-kernel - Re: linux-next: kbuild tree build failure

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Message-ID: <20091014074344.GA6330@merkur.ravnborg.org>
Date:	Wed, 14 Oct 2009 09:43:44 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: linux-next: kbuild tree build failure

On Wed, Oct 14, 2009 at 12:20:24PM +1100, Stephen Rothwell wrote:
> Hi Sam,
> 
> Today's linux-next build (x86_64 allmodconfig) failed like this:
> 
> In file included from arch/x86/kernel/syscall_64.c:28:
> arch/x86/include/asm/unistd_64.h:665: error: array index in initializer exceeds array bounds
> arch/x86/include/asm/unistd_64.h:665: error: (near initialization for 'sys_call_table')
> arch/x86/include/asm/unistd_64.h:665: warning: excess elements in array initializer
> arch/x86/include/asm/unistd_64.h:665: warning: (near initialization for 'sys_call_table')
> 
> Exposed by commit a2e2725541fad72416326798c2d7fa4dafb7d337 ("net:
> Introduce recvmmsg socket syscall").  include/asm/asm-offsets.h did not
> get updated even though arch/x86/kernel/asm-offsets.s did.  Ah,
> generated/asm-offsets.h has been updated but my build tree still has the
> (generated in a previous build) include/asm/asm-offsets.h which is
> presumably found before the new arch/x86/include/asm/asm-offsets.h
> introduced by commit fe5ff47a5d79ca99ec7e3155eb19469b44905b2c ("kbuild:
> move asm-offsets.h to include/generated").
> 
> Sam, can you think of a better migration path?

I once thought of forefully removing include/asm to avoid this.
Maybe we could let "make clean" remove include/asm -
I expect this would have helped in this situation?

I'm planning to redo the serie within the next couple of weeks anyway.

	Sam
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