Fix overbroad /proc/timer_list file permissions

Index: 2.6.28-rc6/kernel/time/timer_list.c
===================================================================
@@ -286,7 +286,7 @@
 {
 	struct proc_dir_entry *pe;
 
-	pe = proc_create("timer_list", 0644, NULL, &timer_list_fops);
+	pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
 	if (!pe)
 		return -ENOMEM;
 	return 0;

Index: 2.6.28-rc6/kernel/time/timer_list.c
===================================================================
@@ -250,36 +250,70 @@
 static int timer_list_show(struct seq_file *m, void *v)
 {
 	u64 now = ktime_to_ns(ktime_get());
-	int cpu;
+	int i = *(loff_t *)v;
 
-	SEQ_printf(m, "Timer List Version: v0.4\n");
-	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
-	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
-
-	for_each_online_cpu(cpu)
-		print_cpu(m, cpu, now);
-
-	SEQ_printf(m, "\n");
-	timer_list_show_tickdevices(m);
+	if (i == 0) {
+		SEQ_printf(m, "Timer List Version: v0.4\n");
+		SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n",
+			HRTIMER_MAX_CLOCK_BASES);
+		SEQ_printf(m, "now at %lld nsecs\n",
+			(unsigned long long)now);
+	}
+
+	if (i < nr_cpu_ids) {
+		if (cpu_online(i))
+			print_cpu(m, i, now);
+	}
+
+	if (i == nr_cpu_ids) {
+		SEQ_printf(m, "\n");
+		timer_list_show_tickdevices(m);
+	}
 
 	return 0;
 }
 
 void sysrq_timer_list_show(void)
 {
-	timer_list_show(NULL, NULL);
+	int i;
+	for (i = 0; i <= nr_cpu_ids; i++) {
+		loff_t v = i;
+		timer_list_show(NULL, &v);
+	}
+}
+
+static void *timer_list_start(struct seq_file *m, loff_t *pos)
+{
+	return (*pos <= nr_cpu_ids) ? pos : NULL;
 }
 
+static void *timer_list_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	(*pos)++;
+	if (*pos > nr_cpu_ids)
+		return NULL;
+	return pos;
+}
+
+static void timer_list_stop(struct seq_file *m, void *v) { }
+
+static const struct seq_operations timer_list_seq_ops = {
+	.start = timer_list_start,
+	.next  = timer_list_next,
+	.stop  = timer_list_stop,
+	.show  = timer_list_show
+};
+
 static int timer_list_open(struct inode *inode, struct file *filp)
 {
-	return single_open(filp, timer_list_show, NULL);
+	return seq_open(filp, &timer_list_seq_ops);
 }
 
 static struct file_operations timer_list_fops = {
 	.open		= timer_list_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= single_release,
+	.release	= seq_release,
 };
 
 static int __init init_timer_list_procfs(void)