From: Daniel Bristot de Oliveira <bristot@kernel.org>
Date: Tue, 10 May 2022 09:45:25 +0000 (+0200)
Subject: tracing/timerlat: Do not wakeup the thread if the trace stops at the IRQ
X-Git-Tag: v5.19-rc1~102^2~12
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=9c556e5a4dd5cfc0939a0575577d0517118f98af;p=tomoyo%2Ftomoyo-test1.git

tracing/timerlat: Do not wakeup the thread if the trace stops at the IRQ

There is no need to wakeup the timerlat/ thread if stop tracing is hit
at the timerlat's IRQ handler.

Return before waking up timerlat's thread.

Link: https://lkml.kernel.org/r/b392356c91b56aedd2b289513cc56a84cf87e60d.1652175637.git.bristot@kernel.org

Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---

diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 9b204ee3c6f5..035ec8b84e12 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1595,6 +1595,8 @@ static enum hrtimer_restart timerlat_irq(struct hrtimer *timer)
 
 			osnoise_stop_tracing();
 			notify_new_max_latency(diff);
+
+			return HRTIMER_NORESTART;
 		}
 	}