rculist: Fix another sparse warning

This fixes the following sparse warnings:

make C=1 CF=-D__CHECK_ENDIAN__ net/tipc/name_table.o
net/tipc/name_table.c:977:17: error: incompatible types in comparison expression (different address spaces)
net/tipc/name_table.c:977:17: error: incompatible types in comparison expression (different address spaces)

To silence these spare complaints, an RCU annotation should be added to
"next" pointer of hlist_node structure through hlist_next_rcu() macro
when iterating over a hlist with hlist_for_each_entry_from_rcu().

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index 665397247e82da58f054e6103dc6171399844fad..17c6b1f84a77d3b3073bc272fffc6a6138b322b5 100644 (file)
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -549,8 +549,8 @@ static inline void hlist_add_behind_rcu(struct hlist_node *n,
  */
 #define hlist_for_each_entry_from_rcu(pos, member)                     \
        for (; pos;                                                     \
-            pos = hlist_entry_safe(rcu_dereference((pos)->member.next),\
-                       typeof(*(pos)), member))
+            pos = hlist_entry_safe(rcu_dereference_raw(hlist_next_rcu( \
+                       &(pos)->member)), typeof(*(pos)), member))
 
 #endif /* __KERNEL__ */
 #endif