rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()

This commit moves from the old ACCESS_ONCE() API to the new READ_ONCE()
and WRITE_ONCE() APIs.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck:  Updated to include kernel/torture.c as suggested by Jason Low. ]

diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index a18b16f..6653972 100644 (file)
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -29,8 +29,8 @@
  */
 static inline void INIT_LIST_HEAD_RCU(struct list_head *list)
 {
-       ACCESS_ONCE(list->next) = list;
-       ACCESS_ONCE(list->prev) = list;
+       WRITE_ONCE(list->next, list);
+       WRITE_ONCE(list->prev, list);
 }
 
 /*
@@ -288,7 +288,7 @@ static inline void list_splice_init_rcu(struct list_head *list,
 #define list_first_or_null_rcu(ptr, type, member) \
 ({ \
        struct list_head *__ptr = (ptr); \
-       struct list_head *__next = ACCESS_ONCE(__ptr->next); \
+       struct list_head *__next = READ_ONCE(__ptr->next); \
        likely(__ptr != __next) ? list_entry_rcu(__next, type, member) : NULL; \
 })
 

diff --cc include/linux/rcupdate.h
Simple merge

diff --cc kernel/rcu/rcutorture.c
Simple merge

diff --cc kernel/rcu/srcu.c
Simple merge

diff --cc kernel/rcu/tiny_plugin.h
Simple merge

diff --cc kernel/rcu/tree.c
Simple merge

diff --cc kernel/rcu/tree_plugin.h
Simple merge

diff --cc kernel/rcu/tree_trace.c
Simple merge

diff --cc kernel/rcu/update.c
Simple merge

diff --cc kernel/torture.c
Simple merge