K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2018-11-05T22:51:45.227582Z
K 7
svn:log
V 302
Add a delay_tsc() static function for when DELAY() uses the TSC.

This uses slightly simpler logic than the existing code by using the
full 64-bit counter and thus not having to worry about counter
overflow.

Reviewed by:	kib
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D17850

END