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authorThomas Gleixner <tglx@linutronix.de>2017-09-12 21:37:20 +0200
committerIngo Molnar <mingo@kernel.org>2017-09-14 11:41:08 +0200
commit2a1b8ee4f5665b4291e43e4a25d964c3eb2f4c32 (patch)
tree9d169bafa59b77220d4cd41f0b66438d47663ec7 /kernel
parenta994a3147e4c0c9c50a46e6cace7586254975e20 (diff)
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watchdog/hardlockup/perf: Implement CPU enable replacement
watchdog_nmi_enable() is an unparseable mess, Provide a clean perf specific implementation, which will be used when the existing setup/teardown mess is replaced. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Don Zickus <dzickus@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Ulrich Obergfell <uobergfe@redhat.com> Link: http://lkml.kernel.org/r/20170912194148.180215498@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/watchdog_hld.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/watchdog_hld.c b/kernel/watchdog_hld.c
index f7e752e6e9b4..99a3f22e48cc 100644
--- a/kernel/watchdog_hld.c
+++ b/kernel/watchdog_hld.c
@@ -260,6 +260,17 @@ static int hardlockup_detector_event_create(void)
}
/**
+ * hardlockup_detector_perf_enable - Enable the local event
+ */
+void hardlockup_detector_perf_enable(void)
+{
+ if (hardlockup_detector_event_create())
+ return;
+
+ perf_event_enable(this_cpu_read(watchdog_ev));
+}
+
+/**
* hardlockup_detector_perf_disable - Disable the local event
*/
void hardlockup_detector_perf_disable(void)