hlist_del_rcu
Name
hlist_del_rcu -- deletes entry from hash list without re-initialization
Synopsis
void hlist_del_rcu (struct hlist_node * n);
Note
list_unhashed on entry does not return true after this,
the entry is in an undefined state. It is useful for RCU based
lockfree traversal.
In particular, it means that we can not poison the forward
pointers that may still be used for walking the hash list.