K 10
svn:author
V 4
jeff
K 8
svn:date
V 27
2019-08-18T11:43:58.776566Z
K 7
svn:log
V 212
Add a blocking wait bit to refcount.  This allows refs to be used as a simple
barrier.

Reviewed by:	markj, kib
Discussed with:	jhb
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D21254

END