io_uring: rename prev to head

Calling "prev" a head of a link is a bit misleading. Rename it

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 9ffcfdc..a463402 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4073,10 +4073,10 @@ err_req:
         * conditions are true (normal request), then just queue it.
         */
        if (*link) {
-               struct io_kiocb *prev = *link;
+               struct io_kiocb *head = *link;
 
                if (sqe->flags & IOSQE_IO_DRAIN)
-                       (*link)->flags |= REQ_F_DRAIN_LINK | REQ_F_IO_DRAIN;
+                       head->flags |= REQ_F_DRAIN_LINK | REQ_F_IO_DRAIN;
 
                if (sqe->flags & IOSQE_IO_HARDLINK)
                        req->flags |= REQ_F_HARDLINK;
@@ -4089,11 +4089,11 @@ err_req:
                ret = io_req_defer_prep(req, sqe);
                if (ret) {
                        /* fail even hard links since we don't submit */
-                       prev->flags |= REQ_F_FAIL_LINK;
+                       head->flags |= REQ_F_FAIL_LINK;
                        goto err_req;
                }
-               trace_io_uring_link(ctx, req, prev);
-               list_add_tail(&req->link_list, &prev->link_list);
+               trace_io_uring_link(ctx, req, head);
+               list_add_tail(&req->link_list, &head->link_list);
        } else if (sqe->flags & (IOSQE_IO_LINK|IOSQE_IO_HARDLINK)) {
                req->flags |= REQ_F_LINK;
                if (sqe->flags & IOSQE_IO_HARDLINK)