nmi_watchdog: Use a boolean config flag for compiling

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>
Cc: peterz@infradead.org
Cc: gorcunov@gmail.com
Cc: aris@redhat.com
LKML-Reference: <1266013161-31197-1-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index ada48441aff..7331a16dd82 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