K 10
svn:author
V 4
jeff
K 8
svn:date
V 27
2019-12-15T21:19:41.668754Z
K 7
svn:log
V 281
schedlock 3/4

Eliminate lock recursion from turnstiles.  This was simply used to avoid
tracking the top-level turnstile lock.  explicitly check for it before
picking up and dropping locks.

Reviewed by:	kib
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D22746

END