linux-kernel - Re: [patch] kvm: fix !SMP build error

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Message-ID: <20071024123650.GA31562@elte.hu>
Date:	Wed, 24 Oct 2007 14:36:50 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Avi Kivity <avi@...ranet.com>
Cc:	Jeff Garzik <jeff@...zik.org>, Adrian Bunk <bunk@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, akpm@...ux-foundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [patch] kvm: fix !SMP build error


* Ingo Molnar <mingo@...e.hu> wrote:

> i have triggered this and fixed it the right way - see the patch 
> below. This fixes the 2.6.24-rc1 build error.

and this followup patch is needed too if my patch is applied.

	Ingo

------------------->
Subject: x86: fix build error in arch/x86/kernel/cpu/mtrr/main.c
From: Ingo Molnar <mingo@...e.hu>

ipi_handler() must be available on !SMP too.

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/kernel/cpu/mtrr/main.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Index: linux/arch/x86/kernel/cpu/mtrr/main.c
===================================================================
--- linux.orig/arch/x86/kernel/cpu/mtrr/main.c
+++ linux/arch/x86/kernel/cpu/mtrr/main.c
@@ -139,13 +139,12 @@ struct set_mtrr_data {
 	mtrr_type	smp_type;
 };
 
-#ifdef CONFIG_SMP
-
 static void ipi_handler(void *info)
 /*  [SUMMARY] Synchronisation handler. Executed by "other" CPUs.
     [RETURNS] Nothing.
 */
 {
+#ifdef CONFIG_SMP
 	struct set_mtrr_data *data = info;
 	unsigned long flags;
 
@@ -168,9 +167,8 @@ static void ipi_handler(void *info)
 
 	atomic_dec(&data->count);
 	local_irq_restore(flags);
-}
-
 #endif
+}
 
 static inline int types_compatible(mtrr_type type1, mtrr_type type2) {
 	return type1 == MTRR_TYPE_UNCACHABLE ||
-
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