K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-08-25T19:15:02.372441Z
K 7
svn:log
V 278
In both do_rw_wrlock() and do_rw_rdlock() after r304808, do not
obliterate possible error from sleep with errors from
umtxq_check_susp(), when looping to clear URWLOCK_{READ,WRITE}_WAITERS.

Noted and reviewed by:	vangyzen
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

END