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author | Christoph Hellwig <hch@lst.de> | 2018-09-24 09:43:49 +0200 |
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committer | Jens Axboe <axboe@kernel.dk> | 2018-09-24 20:33:53 +0200 |
commit | 27ca1d4ed04ea29dc77b47190a3cc82697023e76 (patch) | |
tree | 8b69a5b53cc879fcb683ef026b092edd53b65bde /block/blk.h | |
parent | block: move req_gap_{back,front}_merge to blk-merge.c (diff) | |
download | linux-27ca1d4ed04ea29dc77b47190a3cc82697023e76.tar.xz linux-27ca1d4ed04ea29dc77b47190a3cc82697023e76.zip |
block: move req_gap_back_merge to blk.h
No need to expose these helpers outside the block layer.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk.h')
-rw-r--r-- | block/blk.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h index 441c2de1d4b9..63035c95689c 100644 --- a/block/blk.h +++ b/block/blk.h @@ -149,6 +149,25 @@ static inline void blk_queue_enter_live(struct request_queue *q) percpu_ref_get(&q->q_usage_counter); } +static inline bool __bvec_gap_to_prev(struct request_queue *q, + struct bio_vec *bprv, unsigned int offset) +{ + return offset || + ((bprv->bv_offset + bprv->bv_len) & queue_virt_boundary(q)); +} + +/* + * Check if adding a bio_vec after bprv with offset would create a gap in + * the SG list. Most drivers don't care about this, but some do. + */ +static inline bool bvec_gap_to_prev(struct request_queue *q, + struct bio_vec *bprv, unsigned int offset) +{ + if (!queue_virt_boundary(q)) + return false; + return __bvec_gap_to_prev(q, bprv, offset); +} + #ifdef CONFIG_BLK_DEV_INTEGRITY void blk_flush_integrity(void); bool __bio_integrity_endio(struct bio *); |