K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2017-03-22T17:33:57.571897Z
K 7
svn:log
V 191
Extend cmpxchg() to support 8- and 16-bit values, and add xchg().

These are needed to support updated revisions of the DRM code.

Reviewed by:	hselasky (previous version)
MFC after:	2 weeks

END