hlist_add_head_rcu —
void hlist_add_head_rcu ( | struct hlist_node * | n, |
| struct hlist_head * | h); |
Adds the specified element to the specified hlist, while permitting racing traversals.
The caller must take whatever precautions are necessary
(such as holding appropriate locks) to avoid racing
with another list-mutation primitive, such as hlist_add_head_rcu
or hlist_del_rcu, running on this same list.
However, it is perfectly legal to run concurrently with
the _rcu list-traversal primitives, such as
hlist_for_each_entry_rcu, used to prevent memory-consistency
problems on Alpha CPUs. Regardless of the type of CPU, the
list-traversal primitive must be guarded by rcu_read_lock.