From 5126f498d459799cd343a07cee4db44e5d73cff6 Mon Sep 17 00:00:00 2001
From: Michael Wang <wangyun@linux.vnet.ibm.com>
Date: Thu, 20 Sep 2012 08:51:03 +0800
Subject: [PATCH] --- yaml --- r: 338821 b: refs/heads/master c:
 374b928ee8061fdbb0b527fb3924080ba2437767 h: refs/heads/master i:   338819:
 4c98c1cad001fc2e36580b2d9600efecd54c62c4 v: v3

---
 [refs]                       |  2 +-
 trunk/kernel/rcutree_trace.c | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 699fc1eb391c..9740a8c9ed0b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 573bcd40d221bd6d7cebf27dee120bd242f5feb5
+refs/heads/master: 374b928ee8061fdbb0b527fb3924080ba2437767
diff --git a/trunk/kernel/rcutree_trace.c b/trunk/kernel/rcutree_trace.c
index 62223a27f985..0dfe9b512f0f 100644
--- a/trunk/kernel/rcutree_trace.c
+++ b/trunk/kernel/rcutree_trace.c
@@ -46,6 +46,36 @@
 #define RCU_TREE_NONCORE
 #include "rcutree.h"
 
+static int r_open(struct inode *inode, struct file *file,
+					const struct seq_operations *op)
+{
+	int ret = seq_open(file, op);
+	if (!ret) {
+		struct seq_file *m = (struct seq_file *)file->private_data;
+		m->private = inode->i_private;
+	}
+	return ret;
+}
+
+static void *r_start(struct seq_file *m, loff_t *pos)
+{
+	struct rcu_state *rsp = (struct rcu_state *)m->private;
+	*pos = cpumask_next(*pos - 1, cpu_possible_mask);
+	if ((*pos) < nr_cpu_ids)
+		return per_cpu_ptr(rsp->rda, *pos);
+	return NULL;
+}
+
+static void *r_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	(*pos)++;
+	return r_start(m, pos);
+}
+
+static void r_stop(struct seq_file *m, void *v)
+{
+}
+
 static int show_rcubarrier(struct seq_file *m, void *unused)
 {
 	struct rcu_state *rsp;