[PATCH 1/4] nmi_watchdog: use a boolean config flag for compiling

[Don Zickus <dzickus@redhat.com>]

Determines if an arch has setup arch specific perf_events and nmi_watchdog
code.  This should restrict compiles to only those arches ready.

Signed-off-by: Don Zickus <dzickus@redhat.com>
---
 arch/x86/Kconfig  |    1 +
 init/Kconfig      |    5 +++++
 lib/Kconfig.debug |    3 +--
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index cbcbfde..4f9685f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -52,6 +52,7 @@ config X86
 	select HAVE_KERNEL_LZO
 	select HAVE_HW_BREAKPOINT
 	select PERF_EVENTS
+	select PERF_EVENTS_NMI
 	select ANON_INODES
 	select HAVE_ARCH_KMEMCHECK
 	select HAVE_USER_RETURN_NOTIFIER
diff --git a/init/Kconfig b/init/Kconfig
index ada4844..7331a16 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -946,6 +946,11 @@ config PERF_USE_VMALLOC
 	help
 	  See tools/perf/design.txt for details
 
+config PERF_EVENTS_NMI
+	bool
+	help
+	  Arch has support for nmi_watchdog
+
 menu "Kernel Performance Events And Counters"
 
 config PERF_EVENTS
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index acef882..01a4d85 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -172,8 +172,7 @@ config DETECT_SOFTLOCKUP
 
 config NMI_WATCHDOG
 	bool "Detect Hard Lockups with an NMI Watchdog"
-	depends on DEBUG_KERNEL && PERF_EVENTS
-	depends on X86
+	depends on DEBUG_KERNEL && PERF_EVENTS && PERF_EVENTS_NMI
 	default y
 	help
 	  Say Y here to enable the kernel to use the NMI as a watchdog
-- 
1.6.6.83.gc9a2