K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2017-01-20T19:08:44.841517Z
K 7
svn:log
V 227
Use SFENCE for ordering CLFLUSHOPT.

SDM states that CLFLUSHOPT instructions can be ordered with other
writes by SFENCE, heavier MFENCE is not required.

Reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks

END