MFC r277629 (by will):

MFC r277629 (by will):
When creating or updating a node, use vfs_timestamp() for "now" instead
of gethrestime(), to allow the administrator to decide the appropriate
timestamp precision instead of always using nanosecond precision.

git-svn-id: svn://svn.freebsd.org/base/stable/10@297144 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f