From 5f29805a4f4627e766f862ff9f10c14f5f314359 Mon Sep 17 00:00:00 2001
From: Don Zickus <dzickus@redhat.com>
Date: Mon, 13 Dec 2010 10:31:58 -0500
Subject: [PATCH] x86, watchdog: Compile fix when CONFIG_LOCAL_APIC not enabled
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When adjusting the code to handle removing the old nmi watchdog,
I forgot to consider the compile case when the local apic is not
enabled.

This change fixes the following build error:

  arch/x86/kernel/apic/hw_nmi.c:28:6: error: redefinition of ‘touch_nmi_watchdog’

Signed-off-by: Don Zickus <dzickus@redhat.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Rakib Mullick <rakib.mullick@gmail.com>
LKML-Reference: <20101213153719.GD18577@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 arch/x86/kernel/apic/hw_nmi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index c558e1101edf..93da91df5b38 100644
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -17,6 +17,7 @@
 #include <linux/nmi.h>
 #include <linux/module.h>
 
+#ifdef ARCH_HAS_NMI_WATCHDOG
 #ifdef CONFIG_HARDLOCKUP_DETECTOR
 u64 hw_nmi_get_sample_period(void)
 {
@@ -31,6 +32,8 @@ void touch_nmi_watchdog(void)
 }
 EXPORT_SYMBOL(touch_nmi_watchdog);
 #endif
+#endif
+
 #ifdef arch_trigger_all_cpu_backtrace
 /* For reliability, we're prepared to waste bits here. */
 static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;
-- 
2.20.1