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| author | Keith Busch <kbusch@kernel.org> | 2023-01-05 11:07:34 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-01-11 10:31:49 -0700 |
| commit | d46aa786fa53cbc92593089374e49c94fd9063ae (patch) | |
| tree | 7ff7c5e0d2fffecac8d4e0eec74cb5729e8b0517 | |
| parent | 4397a17c1dc53f436285f372432dd1aea44e7953 (diff) | |
| download | linux-rpi-d46aa786fa53cbc92593089374e49c94fd9063ae.tar.gz linux-rpi-d46aa786fa53cbc92593089374e49c94fd9063ae.tar.bz2 linux-rpi-d46aa786fa53cbc92593089374e49c94fd9063ae.zip | |
block: use iter_ubuf for single range
This is more efficient than iter_iov.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
[axboe: fold in iovec assumption fix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/blk-map.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/blk-map.c b/block/blk-map.c index 19940c978c73..f2135e6ee8f6 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -31,7 +31,8 @@ static struct bio_map_data *bio_alloc_map_data(struct iov_iter *data, return NULL; memcpy(bmd->iov, data->iov, sizeof(struct iovec) * data->nr_segs); bmd->iter = *data; - bmd->iter.iov = bmd->iov; + if (iter_is_iovec(data)) + bmd->iter.iov = bmd->iov; return bmd; } @@ -641,7 +642,7 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, copy = true; else if (iov_iter_is_bvec(iter)) map_bvec = true; - else if (!iter_is_iovec(iter)) + else if (!user_backed_iter(iter)) copy = true; else if (queue_virt_boundary(q)) copy = queue_virt_boundary(q) & iov_iter_gap_alignment(iter); @@ -682,9 +683,8 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq, struct rq_map_data *map_data, void __user *ubuf, unsigned long len, gfp_t gfp_mask) { - struct iovec iov; struct iov_iter i; - int ret = import_single_range(rq_data_dir(rq), ubuf, len, &iov, &i); + int ret = import_ubuf(rq_data_dir(rq), ubuf, len, &i); if (unlikely(ret < 0)) return ret; |