Merge intel_pstate driver updates for v4.12.

[karo-tx-linux.git] / include / linux / rculist_nulls.h

diff --git a/include/linux/rculist_nulls.h b/include/linux/rculist_nulls.h
index 4ae95f7e8597b0b43575d04aaf524cf252761e6e..a23a3315318048eec1fc18678e17967f03eaa89b 100644 (file)
--- a/include/linux/rculist_nulls.h
+++ b/include/linux/rculist_nulls.h
@@ -156,5 +156,19 @@ static inline void hlist_nulls_add_tail_rcu(struct hlist_nulls_node *n,
                ({ tpos = hlist_nulls_entry(pos, typeof(*tpos), member); 1; }); \
                pos = rcu_dereference_raw(hlist_nulls_next_rcu(pos)))
 
+/**
+ * hlist_nulls_for_each_entry_safe -
+ *   iterate over list of given type safe against removal of list entry
+ * @tpos:      the type * to use as a loop cursor.
+ * @pos:       the &struct hlist_nulls_node to use as a loop cursor.
+ * @head:      the head for your list.
+ * @member:    the name of the hlist_nulls_node within the struct.
+ */
+#define hlist_nulls_for_each_entry_safe(tpos, pos, head, member)               \
+       for (({barrier();}),                                                    \
+            pos = rcu_dereference_raw(hlist_nulls_first_rcu(head));            \
+               (!is_a_nulls(pos)) &&                                           \
+               ({ tpos = hlist_nulls_entry(pos, typeof(*tpos), member);        \
+                  pos = rcu_dereference_raw(hlist_nulls_next_rcu(pos)); 1; });)
 #endif
 #endif