linux-kernel - Re: compilation error in linus git tree

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Message-ID: <20090330161606.GA5979@nowhere>
Date:	Mon, 30 Mar 2009 18:16:07 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Peter Teoh <htmldeveloper@...il.com>, Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: compilation error in linus git tree

Hi,


On Mon, Mar 30, 2009 at 12:01:59PM -0400, Peter Teoh wrote:
> just git pulled and compiled with the following errors:
> 
>   CC [M]  arch/x86/kernel/cpu/cpufreq/speedstep-lib.o
>   CC [M]  arch/x86/kernel/cpu/cpufreq/p4-clockmod.o
> arch/x86/kernel/cpu/cpufreq/p4-clockmod.c: In function ‘cpufreq_p4_cpu_init’:
> arch/x86/kernel/cpu/cpufreq/p4-clockmod.c:232: error: implicit
> declaration of function ‘recalibrate_cpu_khz’
> make[3]: *** [arch/x86/kernel/cpu/cpufreq/p4-clockmod.o] Error 1
> make[2]: *** [arch/x86/kernel/cpu/cpufreq] Error 2
> make[1]: *** [arch/x86/kernel/cpu] Error 2
> make: *** [arch/x86/kernel] Error 2
> 
> not sure where is the best place to put this, but the error is resolved via
> 
> extern int recalibrate_cpu_khz(void);
>
> inside the file:
> 
> arch/x86/kernel/cpu/cpufreq/p4-clockmod.c


Indeed but its prototype is already defined in asm/timer.h
This is a missing include, can you tell me if the patch below fixes
your problem?

Thanks,
Frederic.


--

>From c4a2eec69fa98b6cdb060c593a720099878bf854 Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@...il.com>
Date: Mon, 30 Mar 2009 18:08:37 +0200
Subject: [PATCH] x86: fix missing include asm/timer.h in p4-clockmod.c

Impact: fix build error

arch/x86/kernel/cpu/cpufreq/p4-clockmod.c lacks the prototype
of recalibrate_cpu_khz(), we need to include asm/timer.h

Reported-by: Peter Teoh <htmldeveloper@...il.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 arch/x86/kernel/cpu/cpufreq/p4-clockmod.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
index d8341d1..aca3f11 100644
--- a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
@@ -31,6 +31,7 @@
 #include <asm/processor.h>
 #include <asm/msr.h>
 #include <asm/timex.h>
+#include <asm/timer.h>
 
 #include "speedstep-lib.h"
 
-- 
1.6.1


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