um: Use enum req_op where appropriate

Improve static type checking by using type enum req_op instead of int where
appropriate.

Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220714180729.1065367-21-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 479b79e..eb2d2f0 100644 (file)
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -1262,7 +1262,7 @@ static void ubd_map_req(struct ubd *dev, struct io_thread_req *io_req,
        struct req_iterator iter;
        int i = 0;
        unsigned long byte_offset = io_req->offset;
-       int op = req_op(req);
+       enum req_op op = req_op(req);
 
        if (op == REQ_OP_WRITE_ZEROES || op == REQ_OP_DISCARD) {
                io_req->io_desc[0].buffer = NULL;
@@ -1325,7 +1325,7 @@ static int ubd_submit_request(struct ubd *dev, struct request *req)
        int segs = 0;
        struct io_thread_req *io_req;
        int ret;
-       int op = req_op(req);
+       enum req_op op = req_op(req);
 
        if (op == REQ_OP_FLUSH)
                segs = 0;