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Diffstat (limited to 'kernel/watchdog.c')
-rw-r--r--kernel/watchdog.c21
1 files changed, 2 insertions, 19 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 49d02250aaac..f2be11ab7e08 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -83,8 +83,6 @@ static unsigned long soft_lockup_nmi_warn;
#ifdef CONFIG_HARDLOCKUP_DETECTOR
static int hardlockup_panic =
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC_VALUE;
-
-static bool hardlockup_detector_enabled = true;
/*
* We may not want to enable hard lockup detection by default in all cases,
* for example when running the kernel as a guest on a hypervisor. In these
@@ -93,14 +91,9 @@ static bool hardlockup_detector_enabled = true;
* kernel command line parameters are parsed, because otherwise it is not
* possible to override this in hardlockup_panic_setup().
*/
-void watchdog_enable_hardlockup_detector(bool val)
-{
- hardlockup_detector_enabled = val;
-}
-
-bool watchdog_hardlockup_detector_is_enabled(void)
+void hardlockup_detector_disable(void)
{
- return hardlockup_detector_enabled;
+ watchdog_enabled &= ~NMI_WATCHDOG_ENABLED;
}
static int __init hardlockup_panic_setup(char *str)
@@ -530,15 +523,6 @@ static int watchdog_nmi_enable(unsigned int cpu)
if (!(watchdog_enabled & NMI_WATCHDOG_ENABLED))
goto out;
- /*
- * Some kernels need to default hard lockup detection to
- * 'disabled', for example a guest on a hypervisor.
- */
- if (!watchdog_hardlockup_detector_is_enabled()) {
- event = ERR_PTR(-ENOENT);
- goto handle_err;
- }
-
/* is it already setup and enabled? */
if (event && event->state > PERF_EVENT_STATE_OFF)
goto out;
@@ -553,7 +537,6 @@ static int watchdog_nmi_enable(unsigned int cpu)
/* Try to register using hardware perf events */
event = perf_event_create_kernel_counter(wd_attr, cpu, NULL, watchdog_overflow_callback, NULL);
-handle_err:
/* save cpu0 error for future comparision */
if (cpu == 0 && IS_ERR(event))
cpu0_err = PTR_ERR(event);