kern/46657: PPS stops working on ntpd restart

[hmurray%megapathdsl.net@localhost]

>Number:         46657
>Category:       kern
>Synopsis:       PPS stops working on ntpd restart
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jul 05 01:05:00 +0000 2012
>Originator:     Hal Murray
>Release:        6.0_BETA2
>Organization:
>Environment:
System: NetBSD bob.example.com 6.0_BETA2 NetBSD 6.0_BETA2 (BOB) #3: Sun Jun 10 
22:27:20 PDT 2012 
murray%bob.example.com@localhost:/usr/src/sys/arch/i386/compile/BOB i386

>Description:
The PPS interface is needed for good timkeeping.
I think it needs:
  options         PPS_SYNC

It works fine the first time after the system is booted.  If ntpd is
restarted, it stops working.

It worked as expected in 5.1.2

I can easily test any proposed fix.

>How-To-Repeat:
/etc/rc.d/ntpd restart (on a system using PPS)

>Fix: