[PATCH v3 05/13] VFS hot tracking, rcu: introduce one rcu macro for list

[zwu.kernel@gmail.com]

From: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>

  This rcu macro for list will be used in seq_list
rcu interfaces.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
---
 include/linux/rculist.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index f4b1001..380b9be 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -218,6 +218,11 @@ static inline void list_splice_init_rcu(struct list_head *list,
 	at->prev = last;
 }
 
+#define __list_for_each_rcu(pos, head)				\
+	for (pos = rcu_dereference(list_next_rcu(head));	\
+	     pos != head;						\
+	     pos = rcu_dereference(list_next_rcu(pos)))
+
 /**
  * list_entry_rcu - get the struct for this entry
  * @ptr:        the &struct list_head pointer.
-- 
1.7.11.7