io_uring/rw: enable bio caches for IRQ rw

Now we can use IOCB_ALLOC_CACHE not only for iopoll'ed reads/write but
also for normal IRQ driven I/O.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/fb8bd092ed5a4a3b037e84e4777074d07aa5639a.1667384020.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/rw.c

@@ -665,6 +665,7 @@ static int io_rw_init_file(struct io_kiocb *req, fmode_t mode)
 	ret = kiocb_set_rw_flags(kiocb, rw->flags);
 	if (unlikely(ret))
 		return ret;
+	kiocb->ki_flags |= IOCB_ALLOC_CACHE;
 
 	/*
 	 * If the file is marked O_NONBLOCK, still allow retry for it if it
@@ -680,7 +681,7 @@ static int io_rw_init_file(struct io_kiocb *req, fmode_t mode)
 			return -EOPNOTSUPP;
 
 		kiocb->private = NULL;
-		kiocb->ki_flags |= IOCB_HIPRI | IOCB_ALLOC_CACHE;
+		kiocb->ki_flags |= IOCB_HIPRI;
 		kiocb->ki_complete = io_complete_rw_iopoll;
 		req->iopoll_completed = 0;
 	} else {