io_uring: refactor io_req_map_rw()

Set rw->free_iovec to @iovec, that gives an identical result and stresses
that @iovec param rw->free_iovec play the same role.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 6d8c2dcbfa0811394abc056acea7f9e100f44836..bc7028d9e6f9248248d7fac3fcc1ec00c6b078da 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3010,7 +3010,7 @@ static void io_req_map_rw(struct io_kiocb *req, const struct iovec *iovec,
        struct io_async_rw *rw = &req->io->rw;
 
        memcpy(&rw->iter, iter, sizeof(*iter));
-       rw->free_iovec = NULL;
+       rw->free_iovec = iovec;
        rw->bytes_done = 0;
        /* can only be fixed buffers, no need to do anything */
        if (iter->type == ITER_BVEC)
@@ -3027,7 +3027,6 @@ static void io_req_map_rw(struct io_kiocb *req, const struct iovec *iovec,
                        memcpy(rw->fast_iov + iov_off, fast_iov + iov_off,
                               sizeof(struct iovec) * iter->nr_segs);
        } else {
-               rw->free_iovec = iovec;
                req->flags |= REQ_F_NEED_CLEANUP;
        }
 }