Merge tag 'for-6.3/iter-ubuf-2023-02-16' of git://git.kernel.dk/linux

Pull io_uring ITER_UBUF conversion from Jens Axboe:
 "Since we now have ITER_UBUF available, switch to using it for single
  ranges as it's more efficient than ITER_IOVEC for that"

* tag 'for-6.3/iter-ubuf-2023-02-16' of git://git.kernel.dk/linux:
  block: use iter_ubuf for single range
  iov_iter: move iter_ubuf check inside restore WARN
  io_uring: use iter_ubuf for single range imports
  io_uring: switch network send/recv to ITER_UBUF
  iov: add import_ubuf()

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;