linux-kernel - Re: [PATCH 6/6] gcov: architecture specific compile flag adjustments

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Message-ID: <4850E875.8060506@de.ibm.com>
Date:	Thu, 12 Jun 2008 11:12:21 +0200
From:	Peter Oberparleiter <peter.oberparleiter@...ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Peter Oberparleiter <oberparleiter@...glemail.com>,
	linux-kernel@...r.kernel.org, ltp-coverage@...ts.sourceforge.net
Subject: Re: [PATCH 6/6] gcov: architecture specific compile flag adjustments

Andrew Morton wrote:
> On Mon, 02 Jun 2008 15:34:47 +0200
> Peter Oberparleiter <peter.oberparleiter@...ibm.com> wrote:
> 
>> Exclude code from profiling which is not linked to the main kernel or
>> which is running in a context not compatible with the assumptions made
>> by gcc's profiling code.
> 
> powerpc allmodconfig fails with
> 
> Error: External symbol '__gcov_init' referenced from prom_init.c
> Error: External symbol '__gcov_merge_add' referenced from prom_init.c

--
From: Peter Oberparleiter <peter.oberparleiter@...ibm.com>

Fix for gcov patch fallout:

powerpc allmodconfig fails with

Error: External symbol '__gcov_init' referenced from prom_init.c
Error: External symbol '__gcov_merge_add' referenced from prom_init.c

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@...ibm.com>
---
 arch/powerpc/kernel/Makefile |    1 +
 1 files changed, 1 insertion(+)

Index: linux-2.6.26-rc5-mm2/arch/powerpc/kernel/Makefile
===================================================================
--- linux-2.6.26-rc5-mm2.orig/arch/powerpc/kernel/Makefile
+++ linux-2.6.26-rc5-mm2/arch/powerpc/kernel/Makefile
@@ -11,6 +11,7 @@ ifeq ($(CONFIG_PPC32),y)
 CFLAGS_prom_init.o      += -fPIC
 CFLAGS_btext.o		+= -fPIC
 endif
+GCOV_prom_init.o := n
 
 ifdef CONFIG_FTRACE
 # Do not trace early boot code
--
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