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

[tip-bot for Will Deacon]

Commit-ID:  c9bbdd4830ab06288bb1d8c00ed8c8c6e80e377a
Gitweb:     http://git.kernel.org/tip/c9bbdd4830ab06288bb1d8c00ed8c8c6e80e377a
Author:     Will Deacon <will.deacon@xxxxxxx>
AuthorDate: Mon, 15 Aug 2016 11:42:45 +0100
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Mon, 5 Sep 2016 13:19:18 +0200

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@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vince Weaver <vincent.weaver@xxxxxxxxx>
Cc: mark.rutland@xxxxxxx
Link: http://lkml.kernel.org/r/1471257765-29662-1-git-send-email-will.deacon@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/events/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index dff00c7..74f22a9 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;
 }