K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-05-22T23:25:01.233467Z
K 7
svn:log
V 180
Replace hand-made exclusive lock, protecting against parallel
swapon/swapoff invocations, with sx.

Reviewed by:	alc (as part of larger patch)
Sponsored by:	The FreeBSD Foundation

END