X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Flinux%2Fperf_event.h;h=9b60bb89d86ab817737139c18b8b6186d08de875;hb=c2b43854aad9e52b422e6c6342a1da2261f98fa5;hp=fe156a8170aa39ab4236a22174aa73ac0959d93b;hpb=1791596be2723f01de2f69d16a422fdba182c706;p=platform%2Fkernel%2Flinux-rpi.git

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index fe156a8..9b60bb8 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -683,7 +683,9 @@ struct perf_event {
 	/*
 	 * timestamp shadows the actual context timing but it can
 	 * be safely used in NMI interrupt context. It reflects the
-	 * context time as it was when the event was last scheduled in.
+	 * context time as it was when the event was last scheduled in,
+	 * or when ctx_sched_in failed to schedule the event because we
+	 * run out of PMC.
 	 *
 	 * ctx_time already accounts for ctx->timestamp. Therefore to
 	 * compute ctx_time for a sample, simply add perf_clock().