tipc: convert name table read-write lock to RCU
Convert tipc name table read-write lock to RCU. After this change,
a new spin lock is used to protect name table on write side while
RCU is applied on read side.
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index 372ad5e..aa79b3c 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -542,6 +542,15 @@
pos = hlist_entry_safe(rcu_dereference_bh((pos)->member.next),\
typeof(*(pos)), member))
+/**
+ * hlist_for_each_entry_from_rcu - iterate over a hlist continuing from current point
+ * @pos: the type * to use as a loop cursor.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_from_rcu(pos, member) \
+ for (; pos; \
+ pos = hlist_entry_safe(rcu_dereference((pos)->member.next),\
+ typeof(*(pos)), member))
#endif /* __KERNEL__ */
#endif