linux-kernel - [PATCH] [40/50] i386: Fix section mismatch

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Message-Id: <20070921223240.66AB31479D@wotan.suse.de>
Date:	Sat, 22 Sep 2007 00:32:40 +0200 (CEST)
From:	Andi Kleen <ak@...e.de>
To:	satyam@...radead.org, patches@...-64.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [40/50] i386: Fix section mismatch


From: Satyam Sharma <satyam@...radead.org>

Fix bugzilla #8679

WARNING: arch/i386/kernel/built-in.o(.data+0x2148): Section mismatch: reference
to .init.text: (between 'thermal_throttle_cpu_notifier' and 'mtrr_mutex')

comes because struct notifier_block thermal_throttle_cpu_notifier in
arch/i386/kernel/cpu/mcheck/therm_throt.c goes in .data section but the
notifier callback function itself has been marked __cpuinit which becomes
__init == .init.text when HOTPLUG_CPU=n.  The warning is bogus because the
callback will never be called out if HOTPLUG_CPU=n in the first place (as
one can see from kernel/cpu.c, the cpu_chain itself is __cpuinitdata :-)

So, let's mark thermal_throttle_cpu_notifier as __cpuinitdata to fix
the section mismatch warning.

Signed-off-by: Satyam Sharma <satyam@...radead.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Andi Kleen <ak@...e.de>

---

 arch/i386/kernel/cpu/mcheck/therm_throt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/arch/i386/kernel/cpu/mcheck/therm_throt.c
===================================================================
--- linux.orig/arch/i386/kernel/cpu/mcheck/therm_throt.c
+++ linux/arch/i386/kernel/cpu/mcheck/therm_throt.c
@@ -152,7 +152,7 @@ static __cpuinit int thermal_throttle_cp
 	return NOTIFY_OK;
 }
 
-static struct notifier_block thermal_throttle_cpu_notifier =
+static struct notifier_block thermal_throttle_cpu_notifier __cpuinitdata =
 {
 	.notifier_call = thermal_throttle_cpu_callback,
 };
-
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