| From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| Date: Thu, 4 Feb 2016 16:38:10 +0100 |
| Subject: [PATCH] kernel/perf: mark perf_cpu_context's timer as irqsafe |
| |
| Otherwise we get a WARN_ON() backtrace and some events are reported as |
| "not counted". |
| |
| Cc: stable-rt@vger.kernel.org |
| Reported-by: Yang Shi <yang.shi@linaro.org> |
| Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| --- |
| kernel/events/core.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| --- a/kernel/events/core.c |
| +++ b/kernel/events/core.c |
| @@ -1050,6 +1050,7 @@ static void __perf_mux_hrtimer_init(stru |
| raw_spin_lock_init(&cpuctx->hrtimer_lock); |
| hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED); |
| timer->function = perf_mux_hrtimer_handler; |
| + timer->irqsafe = 1; |
| } |
| |
| static int perf_mux_hrtimer_restart(struct perf_cpu_context *cpuctx) |
