seq_hlist_start_head_rcu - start an iteration of a hlist protected by RCU
2. SYNOPSIS ▲
struct hlist_node * seq_hlist_start_head_rcu(struct hlist_head * head , loff_t pos );
3. ARGUMENTS ▲
the head of the hlist
the start position of the sequence
4. DESCRIPTION ▲
Called at seq_file->op->start. Call this function if you want to print a header at the top of the output.
This list-traversal primitive may safely run concurrently with the _rcu list-mutation primitives such as hlist_add_head_rcu as long as the traversal is guarded by rcu_read_lock.
5. COPYRIGHT ▲