K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2015-01-30T11:41:46.817832Z
K 7
svn:log
V 370
When mounting SU-enabled mount point, wait until the softdep_flush()
thread started and incremented the stat_flush_threads [1].

Unconditionally wakeup softdep_flush threads when needed, do not try
to check wchan, which is racy and breaks abstraction.

Reported by and discussed with:	glebius, neel
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks

END