[PATCH cpu io threads need not have lots of stuff setup

Everything that has to do with io can be skipped.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/init.c b/init.c
index f27fdf1..b0c35f1 100644
--- a/init.c
+++ b/init.c
@@ -604,6 +604,9 @@
 	int fd, num_maps, blocks, i;
 	struct fio_file *f;
 
+	if (td->io_ops->flags & FIO_CPUIO)
+		return 0;
+
 	fd = open("/dev/urandom", O_RDONLY);
 	if (fd == -1) {
 		td_verror(td, errno);