K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2017-07-13T18:27:22.896467Z
K 7
svn:log
V 190
Add some functions to jiffies.h.

Also add some checks for overflow to existing functions.

Reviewed by:	hselasky
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D11533

END