[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/log.c b/log.c
index 1343556..b151164 100644
--- a/log.c
+++ b/log.c
@@ -172,6 +172,9 @@
 {
 	int ret = 0;
 
+	if (td->io_ops->flags & FIO_CPUIO)
+		return 0;
+
 	if (td->read_iolog_file)
 		ret = init_iolog_read(td);
 	else if (td->write_iolog_file)