From: Will Deacon <will.deacon@arm.com>
Date: Mon, 15 Aug 2016 10:42:45 +0000 (+0100)
Subject: perf/core: Don't pass PERF_EF_START to the PMU ->start callback
X-Git-Tag: v4.9-rc1~164^2~10
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c9bbdd4830ab06288bb1d8c00ed8c8c6e80e377a;p=karo-tx-linux.git

perf/core: Don't pass PERF_EF_START to the PMU ->start callback

PERF_EF_START is a flag to indicate to the PMU ->add() callback that, as
well as claiming the PMU resources required by the event being added,
it should also start the PMU.

Passing this flag to the ->start() callback doesn't make sense, because
->start() always tries to start the PMU. Remove it.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: mark.rutland@arm.com
Link: http://lkml.kernel.org/r/1471257765-29662-1-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/events/core.c b/kernel/events/core.c
index dff00c787867..74f22a95eb63 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -2492,7 +2492,7 @@ static int __perf_event_stop(void *info)
 	 * while restarting.
 	 */
 	if (sd->restart)
-		event->pmu->start(event, PERF_EF_START);
+		event->pmu->start(event, 0);
 
 	return 0;
 }