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

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Date:	Tue, 7 Jul 2009 22:41:50 -0400 (EDT)
From:	Parag Warudkar <parag.lkml@...il.com>
To:	linux-kernel@...r.kernel.org
cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	teawater@...il.com, mingo@...e.hu, tj@...nel.org,
	xiyou.wangcong@...il.com
Subject: [PATCH] elfcore.h : Fix UML build breakage

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.

Signed-off-by: Parag Warudkar <parag.lkml@...il.com>

diff --git a/include/linux/elfcore.h b/include/linux/elfcore.h
index 03ec167..28f722e 100644
--- a/include/linux/elfcore.h
+++ b/include/linux/elfcore.h
@@ -125,7 +125,7 @@ static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t*
 #ifdef 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;