perf_counter: Add counter->id to the throttle event

So as to be able to distuinguish between multiple counters.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 8859b97..ef5d8a5 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -2950,13 +2950,15 @@
 	struct {
 		struct perf_event_header	header;
 		u64				time;
+		u64				id;
 	} throttle_event = {
 		.header = {
 			.type = PERF_EVENT_THROTTLE + 1,
 			.misc = 0,
 			.size = sizeof(throttle_event),
 		},
-		.time = sched_clock(),
+		.time	= sched_clock(),
+		.id	= counter->id,
 	};
 
 	ret = perf_output_begin(&handle, counter, sizeof(throttle_event), 1, 0);