Add hlist_bl_for_each_entry_continue_rcu and hlist_bl_next_rcu
Signed-off-by: Julian Anastasov <ja@xxxxxx>
---
include/linux/rculist_bl.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/include/linux/rculist_bl.h b/include/linux/rculist_bl.h
index 0b952d06eb0b..93a757793d83 100644
--- a/include/linux/rculist_bl.h
+++ b/include/linux/rculist_bl.h
@@ -24,6 +24,10 @@ static inline struct hlist_bl_node *hlist_bl_first_rcu(struct hlist_bl_head *h)
((unsigned long)rcu_dereference_check(h->first, hlist_bl_is_locked(h)) & ~LIST_BL_LOCKMASK);
}
+/* return the next element in an RCU protected list */
+#define hlist_bl_next_rcu(node) \
+ (*((struct hlist_bl_node __rcu **)(&(node)->next)))
+
/**
* hlist_bl_del_rcu - deletes entry from hash list without re-initialization
* @n: the element to delete from the hash list.
@@ -98,4 +102,17 @@ static inline void hlist_bl_add_head_rcu(struct hlist_bl_node *n,
({ tpos = hlist_bl_entry(pos, typeof(*tpos), member); 1; }); \
pos = rcu_dereference_raw(pos->next))
+/**
+ * hlist_bl_for_each_entry_continue_rcu - iterate over a list continuing after
+ * current point
+ * @tpos: the type * to use as a loop cursor.
+ * @pos: the &struct hlist_bl_node to use as a loop cursor.
+ * @member: the name of the hlist_bl_node within the struct.
+ */
+#define hlist_bl_for_each_entry_continue_rcu(tpos, pos, member) \
+ for (pos = rcu_dereference_raw(hlist_bl_next_rcu(&(tpos)->member)); \
+ pos && \
+ ({ tpos = hlist_bl_entry(pos, typeof(*tpos), member); 1; }); \
+ pos = rcu_dereference_raw(hlist_bl_next_rcu(pos)))
+
#endif
--
2.41.0
