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

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Message-ID: <20071024123258.GA28653@elte.hu>
Date:	Wed, 24 Oct 2007 14:32:58 +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: [patch] kvm: fix !SMP build error


* Avi Kivity <avi@...ranet.com> wrote:

> Of course SMP is not required.  I'll submit a patch to make 
> smp_call_function_mask() available on UP kernels.  Andrew, please 
> don't apply the KVM Kconfig patch.

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

	Ingo

------------------->
Subject: kvm: fix !SMP build error
From: Ingo Molnar <mingo@...e.hu>

fix !SMP build error:

drivers/kvm/kvm_main.c: In function 'kvm_flush_remote_tlbs':
drivers/kvm/kvm_main.c:220: error: implicit declaration of function 'smp_call_function_mask'

(and also avoid unused function warning related to up_smp_call_function()
not making use of the 'func' parameter.)

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 include/linux/smp.h |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Index: linux/include/linux/smp.h
===================================================================
--- linux.orig/include/linux/smp.h
+++ linux/include/linux/smp.h
@@ -84,11 +84,12 @@ void smp_prepare_boot_cpu(void);
  *	These macros fold the SMP functionality into a single CPU system
  */
 #define raw_smp_processor_id()			0
-static inline int up_smp_call_function(void)
+static inline int up_smp_call_function(void (*func)(void *), void *info)
 {
 	return 0;
 }
-#define smp_call_function(func,info,retry,wait)	(up_smp_call_function())
+#define smp_call_function(func,info,retry,wait) \
+			(up_smp_call_function(func, info))
 #define on_each_cpu(func,info,retry,wait)	\
 	({					\
 		local_irq_disable();		\
@@ -107,6 +108,8 @@ static inline void smp_send_reschedule(i
 	local_irq_enable();	\
 	0;			\
 })
+#define smp_call_function_mask(mask,func,info,wait) \
+			(up_smp_call_function(func, info))
 
 #endif /* !SMP */
 
-
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