WRITE_ONCE(prev->next, next);
}
+/*
+ * Delete a list entry and clear the 'prev' pointer.
+ *
+ * This is a special-purpose list clearing method used in the networking code
+ * for lists allocated as per-cpu, where we don't want to incur the extra
+ * WRITE_ONCE() overhead of a regular list_del_init(). The code that uses this
+ * needs to check the node 'prev' pointer instead of calling list_empty().
+ */
+static inline void __list_del_clearprev(struct list_head *entry)
+{
+ __list_del(entry->prev, entry->next);
+ entry->prev = NULL;
+}
+
/**
* list_del - deletes entry from list.
* @entry: the element to delete from the list.