- Add the new sched_pctcpu() function to the sched_* api.

- Provide a routine in sched_4bsd to add this functionality.
 - Use sched_pctcpu() in kern_proc, which is the one place outside of
   sched_4bsd where the old pctcpu value was accessed directly.

Approved by:	re

sys/kern/kern_proc.c

@@ -756,7 +756,7 @@ fill_kinfo_proc(p, kp)
 			/* Things in the kse */
 			kp->ki_rqindex = ke->ke_rqindex;
 			kp->ki_oncpu = ke->ke_oncpu;
-			kp->ki_pctcpu = ke->ke_pctcpu;
+			kp->ki_pctcpu = sched_pctcpu(ke);
 		} else {
 			kp->ki_oncpu = -1;
 			kp->ki_lastcpu = -1;

sys/kern/sched_4bsd.c

@@ -648,3 +648,9 @@ sched_sizeof_thread(void)
 {
 	return (sizeof(struct thread));
 }
+
+fixpt_t
+sched_pctcpu(struct kse *ke)
+{
+	return (ke->ke_pctcpu);
+}

sys/sys/sched.h

@@ -62,6 +62,11 @@ void	sched_add(struct kse *ke);
 void	sched_rem(struct kse *ke);
 struct kse *sched_choose(void);
 
+/*
+ * and they use up cpu time.
+ */
+fixpt_t	sched_pctcpu(struct kse *ke);
+
 /*
  * These procedures tell the process data structure allocation code how
  * many bytes to actually allocate.