The function comments of aio_run_iocb and aio_read_events are out of date, so
fix them here.
Reviewed-by: NJeff Moyer <jmoyer@redhat.com>
Signed-off-by: NGu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: NBenjamin LaHaise <bcrl@kvack.org>