linux-kernel - Re: [PATCH 3/3] Fix M68K irqflags

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Date:	Fri, 3 Sep 2010 16:53:23 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	David Howells <dhowells@...hat.com>
CC:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] Fix M68K irqflags

David Howells wrote:
> Greg Ungerer <gerg@...pgear.com> wrote:
> 
>>>  -	DEFINE(THREAD_SIZE, THREAD_SIZE);
>>> -
>> This breaks final link due to missing THREAD_SIZE definition in head.S:
>>
>>   LD      vmlinux
>> arch/m68knommu/platform/coldfire/head.o: In function `_clear_bss':
>> (.head.text+0xa4): undefined reference to `THREAD_SIZE'
>>
>>
>> Without that asm-offsets.c change it works on my ColdFire boards.
>> I am happy with it:
> 
> With that, I get a duplicate reference to THREAD_SIZE.  head.S should include
> asm/thread_info.h rather than THREAD_SIZE being redefined in asm-offsets.
> 
>   CC      init/do_mounts_rd.o
> In file included from /warthog/nfs/linux-2.6-fscache/arch/m68k/include/asm/asm-offsets.h:1,
>                  from arch/m68knommu/platform/coldfire/entry.S:36:
> include/generated/asm-offsets.h:46:1: warning: "THREAD_SIZE" redefined
> In file included from /warthog/nfs/linux-2.6-fscache/arch/m68k/include/asm/thread_info.h:2,
>                  from arch/m68knommu/platform/coldfire/entry.S:32:
> /warthog/nfs/linux-2.6-fscache/arch/m68k/include/asm/thread_info_no.h:27:1: warning: this is the location of the previous definition

Yes, I get that too. I just hadn't tracked down why that was yet.


> Unfortunately, I don't have a binutils that can handle the funny Coldfire
> instructions.  Can you point me at a Coldfire toolchain?

This is what I currently use:

http://www.uclinux.org/pub/uClinux/m68k-elf-tools/tools-20080626/m68k-uclinux-tools-20080626.sh

Its just a binutils-2.18 and gcc-4.2.4 configured for m68k-uclinux
target.

Regards
Greg


------------------------------------------------------------------------
Greg Ungerer  --  Principal Engineer        EMAIL:     gerg@...pgear.com
SnapGear Group, McAfee                      PHONE:       +61 7 3435 2888
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