seq_hlist_start_head_rcu (9) Linux Manual Page
seq_hlist_start_head_rcu – start an iteration of a hlist protected by RCU
Synopsis
struct hlist_node *seq_hlist_start_head_rcu(struct hlist_head *head, loff_t pos);Arguments
head
-
- the head of the hlist
pos
- the start position of the sequence
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.