ceph: use bvec_set_page to initialize a bvec

Use the bvec_set_page helper to initialize a bvec.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230203150634.3199647-13-hch@lst.deReviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs/ceph/file.c

@@ -103,14 +103,10 @@ static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize,
 		size += bytes;
 
 		for ( ; bytes; idx++, bvec_idx++) {
-			struct bio_vec bv = {
-				.bv_page = pages[idx],
-				.bv_len = min_t(int, bytes, PAGE_SIZE - start),
-				.bv_offset = start,
-			};
-
-			bvecs[bvec_idx] = bv;
-			bytes -= bv.bv_len;
+			int len = min_t(int, bytes, PAGE_SIZE - start);
+
+			bvec_set_page(&bvecs[bvec_idx], pages[idx], len, start);
+			bytes -= len;
 			start = 0;
 		}
 	}