K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2015-07-16T13:57:05.938481Z
K 7
svn:log
V 260
vfs: implement v_holdcnt/v_usecount manipulation using atomic ops

Transitions 0->1 and 1->0 (which decide e.g. on putting the vnode on the free
list) of either counter are still guarded with vnode interlock.

Reviewed by:	kib (earlier version)
Tested by:	pho

END