[RFC PATCH 16/39] blktrace: update blk_add_trace_bio_complete()

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Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
---
 kernel/trace/blktrace.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index c9f04cfdfa84..2edd7aa53e35 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1276,7 +1276,25 @@ static void blk_add_trace_bio_complete(void *ignore,
 				       struct request_queue *q, struct bio *bio,
 				       int error)
 {
-	blk_add_trace_bio(q, bio, BLK_TA_COMPLETE, error);
+	u64 ta = 0;
+	struct blk_trace *bt;
+	struct blk_trace_ext *bte;
+
+	rcu_read_lock();
+	bt = rcu_dereference(q->blk_trace);
+	bte = rcu_dereference(q->blk_trace_ext);
+	if (likely(!bt) && likely(!bte) ) {
+		rcu_read_unlock();
+		return;
+	}
+
+	if (bt) {
+		ta = BLK_TA_COMPLETE;
+	} else if (bte) {
+		ta = BLK_TA_COMPLETE_EXT;
+	}
+	rcu_read_unlock();
+	blk_add_trace_bio(q, bio, ta, error);
 }
 
 static void blk_add_trace_bio_backmerge(void *ignore,
-- 
2.22.0




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