lockup_detector: Adapt CONFIG_PERF_EVENT_NMI to other archs
CONFIG_PERF_EVENT_NMI is something that need to be enabled from the
arch. This is fine on x86 as PERF_EVENTS is builtin but if other
archs select it, they will need to handle the PERF_EVENTS dependency.
Instead, handle the dependency in the generic layer:
- archs need to tell what they support through HAVE_PERF_EVENTS_NMI
- Enable magically PERF_EVENTS_NMI if we have PERF_EVENTS and
HAVE_PERF_EVENTS_NMI.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
diff --git a/arch/Kconfig b/arch/Kconfig
index e5eb133..89b0efb 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -145,4 +145,7 @@
config HAVE_USER_RETURN_NOTIFIER
bool
+config HAVE_PERF_EVENTS_NMI
+ bool
+
source "kernel/gcov/Kconfig"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3cb28cd..3cb5bb0 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -54,7 +54,7 @@
select HAVE_KERNEL_LZO
select HAVE_HW_BREAKPOINT
select PERF_EVENTS
- select PERF_EVENTS_NMI
+ select HAVE_PERF_EVENTS_NMI
select ANON_INODES
select HAVE_ARCH_KMEMCHECK
select HAVE_USER_RETURN_NOTIFIER
diff --git a/init/Kconfig b/init/Kconfig
index e44e254..ab733c3 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -943,8 +943,7 @@
See tools/perf/design.txt for details
config PERF_EVENTS_NMI
- bool
- depends on PERF_EVENTS
+ def_bool PERF_EVENTS && HAVE_PERF_EVENTS_NMI
help
System hardware can generate an NMI using the perf event
subsystem. Also has support for calculating CPU cycle events
