diff options
| author | Ulrich Obergfell <uobergfe@redhat.com> | 2015-04-15 01:44:19 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 02:48:59 +0300 |
| commit | 692297d8f96887f836d9049a653ed05a71cf48fb (patch) | |
| tree | 1c19271d875a54dfbdb74bc35d4f386dbc20dc63 /kernel/watchdog.c | |
| parent | b2f57c3a0df9d168220be8848a303a32ef4d2e7d (diff) | |
| download | linux-692297d8f96887f836d9049a653ed05a71cf48fb.tar.xz | |
watchdog: introduce the hardlockup_detector_disable() function
Have kvm_guest_init() use hardlockup_detector_disable() instead of
watchdog_enable_hardlockup_detector(false).
Remove the watchdog_hardlockup_detector_is_enabled() and the
watchdog_enable_hardlockup_detector() function which are no longer needed.
Signed-off-by: Ulrich Obergfell <uobergfe@redhat.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/watchdog.c')
| -rw-r--r-- | kernel/watchdog.c | 21 |
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); |