Mateusz Guzik 5b7d9ae2fd cv: do a lockless check for no waiters in cv_signal and cv_broadcastpri
In case of some consumers like zfs there are no waiters vast majority of
the time

Reviewed by:	jhb
MFC after:	1 week
2016-09-06 17:16:59 +00:00
..
2016-08-24 09:57:19 +00:00
2016-08-15 19:17:00 +00:00
2016-08-24 00:52:30 +00:00
2016-09-06 15:17:35 +00:00