K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2016-12-22T17:51:44.735497Z
K 7
svn:log
V 445
Revert part of r300109.

The removal of TAILQ_FOREACH_SAFE introduced a small race: when the last
thread on a sleepqueue is awoken, it reclaims the sleepqueue and may begin
executing on a different CPU before sleepq_resume_thread() returns. This
leaves a window during which it may go back to sleep and incorrectly be
awoken again by the caller of sleepq_broadcast().

Reported and tested by:	pho
MFC after:	3 days
Sponsored by:	Dell EMC Isilon

END