[patch]blk-mq: add REQ_SYNC early

[Shaohua Li]

Add REQ_SYNC early, so rq_dispatched[] in blk_mq_rq_ctx_init is set correctly.

Signed-off-by: Shaohua Li<shli@xxxxxxxxxxxx>
---
 block/blk-mq.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/block/blk-mq.c
===================================================================
--- linux.orig/block/blk-mq.c	2014-02-19 17:10:02.000000000 +0800
+++ linux/block/blk-mq.c	2014-02-19 18:51:25.082774359 +0800
@@ -926,6 +926,8 @@ static void blk_mq_make_request(struct r
 	ctx = blk_mq_get_ctx(q);
 	hctx = q->mq_ops->map_queue(q, ctx->cpu);
 
+	if (is_sync)
+		rw |= REQ_SYNC;
 	trace_block_getrq(q, bio, rw);
 	rq = __blk_mq_alloc_request(hctx, GFP_ATOMIC, false);
 	if (likely(rq))
--
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