block: export blk_rq_is_poll

This is in preparation to support iopoll for nvme passthrough.

Signed-off-by: Kanchan Joshi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

Author: Kanchan Joshi

block/blk-mq.c

@@ -1233,7 +1233,7 @@ static void blk_end_sync_rq(struct request *rq, blk_status_t ret)
 	complete(&wait->done);
 }
 
-static bool blk_rq_is_poll(struct request *rq)
+bool blk_rq_is_poll(struct request *rq)
 {
 	if (!rq->mq_hctx)
 		return false;
@@ -1243,6 +1243,7 @@ static bool blk_rq_is_poll(struct request *rq)
 		return false;
 	return true;
 }
+EXPORT_SYMBOL_GPL(blk_rq_is_poll);
 
 static void blk_rq_poll_completion(struct request *rq, struct completion *wait)
 {

include/linux/blk-mq.h

@@ -980,6 +980,7 @@ int blk_rq_map_kern(struct request_queue *, struct request *, void *,
 int blk_rq_append_bio(struct request *rq, struct bio *bio);
 void blk_execute_rq_nowait(struct request *rq, bool at_head);
 blk_status_t blk_execute_rq(struct request *rq, bool at_head);
+bool blk_rq_is_poll(struct request *rq);
 
 struct req_iterator {
 	struct bvec_iter iter;