K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2017-12-19T10:05:45.342841Z
K 7
svn:log
V 282
Use atomic_load(9) to read ppsinfo sequence numbers.

In this case volatile qualifiers enusre that a compiler does not
optimize the accesses out.

Reviewed by:	alc, jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D13534

END