linux-kernel - Re: [PATCH] elfcore.h : Fix UML build breakage

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Message-ID: <20090709055855.GB5648@cr0.nay.redhat.com>
Date:	Thu, 9 Jul 2009 13:58:55 +0800
From:	Amerigo Wang <xiyou.wangcong@...il.com>
To:	Parag Warudkar <parag.lkml@...il.com>
Cc:	Amerigo Wang <xiyou.wangcong@...il.com>,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, teawater@...il.com, mingo@...e.hu,
	tj@...nel.org
Subject: Re: [PATCH] elfcore.h : Fix UML build breakage

On Wed, Jul 08, 2009 at 11:46:02AM -0400, Parag Warudkar wrote:
>
>
>On Wed, 8 Jul 2009, Amerigo Wang wrote:
>
>> On Tue, Jul 07, 2009 at 10:41:50PM -0400, Parag Warudkar wrote:
>> >Commit a65e7bfcd74e4c0939f235d2bf9f48ddb3a57991 breaks UML build with 
>> >below error - 
>> >
>> >In file included from fs/proc/kcore.c:17:
>> >include/linux/elfcore.h: In function ‘elf_core_copy_task_regs’:
>> >include/linux/elfcore.h:129: error: implicit declaration of function 
>> >‘task_pt_regs’
>> >
>> >Fix this by restoring the previous behavior of returning 0 for all arches 
>> >like UML that don't define task_pt_regs.
>
>> #elif defined doesn't match #ifdef well, how about:
>> 
>> #if defined (ELF_CORE_COPY_TASK_REGS)
>> ...
>> #elif defined (task_pt_regs)
>> ...
>> #endif
>
>Updated patch below -
>
>Fix UML build breakage due to commit 
>a65e7bfcd74e4c0939f235d2bf9f48ddb3a57991.
>
>Signed-off-by: Parag Warudkar <parag.lkml@...il.com>
>


ACK. Thank you!

It looks like Linus already merged this...


>diff --git a/include/linux/elfcore.h b/include/linux/elfcore.h
>index 03ec167..00d6a68 100644
>--- a/include/linux/elfcore.h
>+++ b/include/linux/elfcore.h
>@@ -122,10 +122,9 @@ static inline void elf_core_copy_kernel_regs(elf_gregset_t *elfregs, struct pt_r
> 
> static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
> {
>-#ifdef ELF_CORE_COPY_TASK_REGS
>-	
>+#if defined (ELF_CORE_COPY_TASK_REGS)
> 	return ELF_CORE_COPY_TASK_REGS(t, elfregs);
>-#else
>+#elif defined (task_pt_regs)
> 	elf_core_copy_regs(elfregs, task_pt_regs(t));
> #endif
> 	return 0;
--
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