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-rw-r--r--arch/Kconfig4
-rw-r--r--init/Kconfig7
-rw-r--r--kernel/watchdog.c14
-rw-r--r--lib/Kconfig.debug3
4 files changed, 14 insertions, 14 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 89b0efb5094..35084f28008 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -147,5 +147,9 @@ config HAVE_USER_RETURN_NOTIFIER
config HAVE_PERF_EVENTS_NMI
bool
+ help
+ System hardware can generate an NMI using the perf event
+ subsystem. Also has support for calculating CPU cycle events
+ to determine how many clock cycles in a given period.
source "kernel/gcov/Kconfig"
diff --git a/init/Kconfig b/init/Kconfig
index ab733c32292..eb77e8ccde1 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -942,13 +942,6 @@ config PERF_USE_VMALLOC
help
See tools/perf/design.txt for details
-config PERF_EVENTS_NMI
- 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
- to determine how many clock cycles in a given period.
-
menu "Kernel Performance Events And Counters"
config PERF_EVENTS
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index be5e74e62be..83fb63155cb 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -37,7 +37,7 @@ static DEFINE_PER_CPU(struct hrtimer, watchdog_hrtimer);
static DEFINE_PER_CPU(bool, softlockup_touch_sync);
static DEFINE_PER_CPU(bool, hard_watchdog_warn);
static DEFINE_PER_CPU(bool, soft_watchdog_warn);
-#ifdef CONFIG_PERF_EVENTS_NMI
+#ifdef CONFIG_HARDLOCKUP_DETECTOR
static DEFINE_PER_CPU(unsigned long, hrtimer_interrupts);
static DEFINE_PER_CPU(unsigned long, hrtimer_interrupts_saved);
static DEFINE_PER_CPU(struct perf_event *, watchdog_ev);
@@ -51,7 +51,7 @@ static int __initdata no_watchdog;
/*
* Should we panic when a soft-lockup or hard-lockup occurs:
*/
-#ifdef CONFIG_PERF_EVENTS_NMI
+#ifdef CONFIG_HARDLOCKUP_DETECTOR
static int hardlockup_panic;
static int __init hardlockup_panic_setup(char *str)
@@ -152,7 +152,7 @@ void touch_softlockup_watchdog_sync(void)
__raw_get_cpu_var(watchdog_touch_ts) = 0;
}
-#ifdef CONFIG_PERF_EVENTS_NMI
+#ifdef CONFIG_HARDLOCKUP_DETECTOR
/* watchdog detector functions */
static int is_hardlockup(int cpu)
{
@@ -189,7 +189,7 @@ static struct notifier_block panic_block = {
.notifier_call = watchdog_panic,
};
-#ifdef CONFIG_PERF_EVENTS_NMI
+#ifdef CONFIG_HARDLOCKUP_DETECTOR
static struct perf_event_attr wd_hw_attr = {
.type = PERF_TYPE_HARDWARE,
.config = PERF_COUNT_HW_CPU_CYCLES,
@@ -239,7 +239,7 @@ static void watchdog_interrupt_count(void)
}
#else
static inline void watchdog_interrupt_count(void) { return; }
-#endif /* CONFIG_PERF_EVENTS_NMI */
+#endif /* CONFIG_HARDLOCKUP_DETECTOR */
/* watchdog kicker functions */
static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
@@ -342,7 +342,7 @@ static int watchdog(void *__bind_cpu)
}
-#ifdef CONFIG_PERF_EVENTS_NMI
+#ifdef CONFIG_HARDLOCKUP_DETECTOR
static int watchdog_nmi_enable(int cpu)
{
struct perf_event_attr *wd_attr;
@@ -393,7 +393,7 @@ static void watchdog_nmi_disable(int cpu)
#else
static int watchdog_nmi_enable(int cpu) { return 0; }
static void watchdog_nmi_disable(int cpu) { return; }
-#endif /* CONFIG_PERF_EVENTS_NMI */
+#endif /* CONFIG_HARDLOCKUP_DETECTOR */
/* prepare/enable/disable routines */
static int watchdog_prepare_cpu(int cpu)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 3a18b0b856c..e65e47d5c5e 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -174,6 +174,9 @@ config LOCKUP_DETECTOR
generate interrupts and kick the watchdog task every 10-12 seconds.
An NMI is generated every 60 seconds or so to check for hardlockups.
+config HARDLOCKUP_DETECTOR
+ def_bool LOCKUP_DETECTOR && PERF_EVENTS && HAVE_PERF_EVENTS_NMI
+
config BOOTPARAM_SOFTLOCKUP_PANIC
bool "Panic (Reboot) On Soft Lockups"
depends on LOCKUP_DETECTOR