io_uring: don't repeat valid flag list

to #28736503

commit c11368a57be460de889696f6ff8815fbcacf4db2 upstream

req->flags stores all sqe->flags. After checking that sqe->flags are
valid set if IOSQE* flags, no need to double check it, just forward them
all.
Signed-off-by: NPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

fs/io_uring.c

@@ -5839,9 +5839,7 @@ static int io_init_req(struct io_ring_ctx *ctx, struct io_kiocb *req,
 	}
 
 	/* same numerical values with corresponding REQ_F_*, safe to copy */
-	req->flags |= sqe_flags & (IOSQE_IO_DRAIN | IOSQE_IO_HARDLINK |
-					IOSQE_ASYNC | IOSQE_FIXED_FILE |
-					IOSQE_BUFFER_SELECT | IOSQE_IO_LINK);
+	req->flags |= sqe_flags;
 
 	if (!io_op_defs[req->opcode].needs_file)
 		return 0;