block: move blk_rq_bio_prep() to linux/blk-mq.h

This is a preparation patch to have minimal block layer request bio
append functionality in the context of the NVMeOF Passthru driver which
falls in the fast path and doesn't need calls from blk_rq_append_bio().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/block/blk.h b/block/blk.h
index dfab98465db9a54086b0f57fb544540ab2671a90..e05507a8d1e3dcc28a09b5e8974b4f2109bb3742 100644 (file)
--- a/block/blk.h
+++ b/block/blk.h
@@ -91,18 +91,6 @@ static inline bool bvec_gap_to_prev(struct request_queue *q,
        return __bvec_gap_to_prev(q, bprv, offset);
 }
 
-static inline void blk_rq_bio_prep(struct request *rq, struct bio *bio,
-               unsigned int nr_segs)
-{
-       rq->nr_phys_segments = nr_segs;
-       rq->__data_len = bio->bi_iter.bi_size;
-       rq->bio = rq->biotail = bio;
-       rq->ioprio = bio_prio(bio);
-
-       if (bio->bi_disk)
-               rq->rq_disk = bio->bi_disk;
-}
-
 #ifdef CONFIG_BLK_DEV_INTEGRITY
 void blk_flush_integrity(void);
 bool __bio_integrity_endio(struct bio *);

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 794b2a33a2c36c8f4c335a9868fbccdb11d2e99a..e7482e6ad3ec678fce6ead748da09e44cc15971d 100644 (file)
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -593,6 +593,18 @@ static inline void blk_mq_cleanup_rq(struct request *rq)
                rq->q->mq_ops->cleanup_rq(rq);
 }
 
+static inline void blk_rq_bio_prep(struct request *rq, struct bio *bio,
+               unsigned int nr_segs)
+{
+       rq->nr_phys_segments = nr_segs;
+       rq->__data_len = bio->bi_iter.bi_size;
+       rq->bio = rq->biotail = bio;
+       rq->ioprio = bio_prio(bio);
+
+       if (bio->bi_disk)
+               rq->rq_disk = bio->bi_disk;
+}
+
 blk_qc_t blk_mq_submit_bio(struct bio *bio);
 
 #endif