check cpu_online() in nr_running()

[William Lee Irwin III]

nr_uninterruptible() and nr_iowait() both check cpu_online(cpu) as
cpu ranges from 0 to NR_CPUS-1; so should nr_running().

-- wli

diff -urpN linux-2.5.63/kernel/sched.c nr_running-2.5.63-1/kernel/sched.c
--- linux-2.5.63/kernel/sched.c	Thu Feb 20 20:33:52 2003
+++ nr_running-2.5.63-1/sched.c	Tue Feb 25 08:23:09 2003
@@ -637,6 +637,8 @@
 	unsigned long i, sum = 0;
 
 	for (i = 0; i < NR_CPUS; i++)
+		if (!cpu_online(i))
+			continue;
 		sum += cpu_rq(i)->nr_running;
 
 	return sum;