[git pull for 2.6.22-rc4 - resend] kbuild: fix sh64 section mismatch problems

[Sam Ravnborg <sam@ravnborg.org>]

Resend of the below pull request.

	Sam

On Mon, Jun 11, 2007 at 09:55:52PM +0200, Sam Ravnborg wrote:
> Hi Linus.
> 
> Please apply following 2 liners fix.
> It will fix a lot of false section mismatch warnings on sh64 and
> Paul asked to have in included before the relase hit the street.
> 
> Please pull this single patch from:
> 	git://master.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fix.git
> 
> 	Sam
> 
> Patch below for reference:
> 
>  modpost.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> >From 2648a53acf16a837e11836203aadb219bd951a1e Mon Sep 17 00:00:00 2001
> From: Sam Ravnborg <sam@ravnborg.org>
> Date: Mon, 11 Jun 2007 21:52:04 +0200
> Subject: [PATCH] kbuild: fix sh64 section mismatch problems
> 
> There's a special .cranges section that is almost always generated,
> with data being moved to the appropriate section by the linker at a later
> stage.
> 
> To give a bit of background, sh64 has both a native SHmedia instruction
> set (32-bit instructions) and SHcompact (which is compatability with
> normal SH -- 16-bit, a massively reduced register set, etc.). code ranges
> are emitted when we're using the 32-bit ABI, but not the 64-bit one.
> 
> It is a special staging section used solely by binutils where code with
> different flags get placed (more specifically differing flags for input
> and output sections), before being lazily merged by the linker.
> 
> The closest I've been able to find to documentation is:
>   http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/ld/emultempl/sh64elf.em?rev=1.10&content-type=text/x-cvsweb-markup&cvsroot=src
> 
> It's an array of 8-byte Elf32_CRange structure given in
>   http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/bfd/elf32-sh64.h?rev=1.4&content-type=text/x-cvsweb-markup&cvsroot=src
> that describes for which ISA a range is used.
> 
> Silence the warnings by allowing references from .init.text to .cranges.
> 
> The following warnings are fixed:
> 
> WARNING: init/built-in.o(.cranges+0x0): Section mismatch: reference to .init.text:
> WARNING: init/built-in.o(.cranges+0xa): Section mismatch: reference to .init.text:
> WARNING: init/built-in.o(.cranges+0x14): Section mismatch: reference to .init.text:
> WARNING: init/built-in.o(.cranges+0x1e): Section mismatch: reference to .init.text:
> WARNING: init/built-in.o(.cranges+0x28): Section mismatch: reference to .init.text:
> WARNING: init/built-in.o(.cranges+0x32): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x50): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x5a): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x64): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0xfa): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x104): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x10e): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x14a): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x154): Section mismatch: reference to .init.text:
> WARNING: kernel/built-in.o(.cranges+0x15e): Section mismatch: reference to .init.text:
> WARNING: mm/built-in.o(.cranges+0x6e): Section mismatch: reference to .init.text:
> WARNING: mm/built-in.o(.cranges+0x78): Section mismatch: reference to .init.text:
> WARNING: mm/built-in.o(.cranges+0x82): Section mismatch: reference to .init.text:
> WARNING: mm/built-in.o(.cranges+0xaa): Section mismatch: reference to .init.text:
> WARNING: fs/built-in.o(.cranges+0x136): Section mismatch: reference to .init.text:
> WARNING: fs/built-in.o(.cranges+0x140): Section mismatch: reference to .init.text:
> WARNING: fs/built-in.o(.cranges+0x14a): Section mismatch: reference to .init.text:
> WARNING: fs/built-in.o(.cranges+0x168): Section mismatch: reference to .init.text:
> WARNING: fs/built-in.o(.cranges+0x1f4): Section mismatch: reference to .init.text:
> WARNING: fs/built-in.o(.cranges+0x1fe): Section mismatch: reference to .init.text:
> WARNING: net/built-in.o(.cranges+0x302): Section mismatch: reference to .init.text:
> WARNING: net/built-in.o(.cranges+0x30c): Section mismatch: reference to .init.text:
> WARNING: net/built-in.o(.cranges+0x316): Section mismatch: reference to .init.text:
> WARNING: net/built-in.o(.cranges+0x3a2): Section mismatch: reference to .init.text:
> WARNING: net/built-in.o(.cranges+0x3ac): Section mismatch: reference to .init.text:
> WARNING: net/built-in.o(.cranges+0x4ce): Section mismatch: reference to .init.text:
> WARNING: net/built-in.o(.cranges+0x4d8): Section mismatch: reference to .init.text:
> 
> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
> Cc: Kaz Kojima <kkojima@rr.iij4u.or.jp>
> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
> ---
>  scripts/mod/modpost.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index 8e5610d..3645e98 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -1052,6 +1052,7 @@ static int init_section_ref_ok(const char *name)
>  		".plt",  /* seen on ARCH=um build on x86_64. Harmless */
>  		"__ftr_fixup",		/* powerpc cpu feature fixup */
>  		"__fw_ftr_fixup",	/* powerpc firmware feature fixup */
> +		".cranges",	/* used by sh64 */
>  		NULL
>  	};
>  	/* Start of section names */
> @@ -1132,6 +1133,7 @@ static int exit_section_ref_ok(const char *name)
>  		".fixup",
>  		".smp_locks",
>  		".plt",  /* seen on ARCH=um build on x86_64. Harmless */
> +		".cranges",	/* used by sh64 */
>  		NULL
>  	};
>  	/* Start of section names */
> -- 
> 1.5.1.rc3.1544.g8a923
> 
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