--- linux-2.6.38-rc2-vs2.3.0.37-rc4/fs/proc/stat.c	2011-02-01 21:55:05.000000000 +0100
+++ linux-2.6.38-rc2-vs2.3.0.37/fs/proc/stat.c	2011-02-01 21:34:39.000000000 +0100
@@ -9,6 +9,7 @@
 #include <linux/slab.h>
 #include <linux/time.h>
 #include <linux/irqnr.h>
+#include <linux/cpuset.h>
 #include <asm/cputime.h>
 
 #ifndef arch_irq_stat_cpu
@@ -31,6 +32,7 @@ static int show_stat(struct seq_file *p,
 	u64 sum_softirq = 0;
 	unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
 	struct timespec boottime;
+	struct cpumask mask;
 
 	user = nice = system = idle = iowait =
 		irq = softirq = steal = cputime64_zero;
@@ -38,7 +40,12 @@ static int show_stat(struct seq_file *p,
 	getboottime(&boottime);
 	jif = boottime.tv_sec;
 
+	cpuset_cpus_allowed(current, &mask);
+
 	for_each_possible_cpu(i) {
+		if (!cpumask_test_cpu(i, &mask))
+			continue;
+
 		user = cputime64_add(user, kstat_cpu(i).cpustat.user);
 		nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
 		system = cputime64_add(system, kstat_cpu(i).cpustat.system);
@@ -76,6 +83,8 @@ static int show_stat(struct seq_file *p,
 		(unsigned long long)cputime64_to_clock_t(guest),
 		(unsigned long long)cputime64_to_clock_t(guest_nice));
 	for_each_online_cpu(i) {
+		if (!cpumask_test_cpu(i, &mask))
+			continue;
 
 		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 		user = kstat_cpu(i).cpustat.user;