suse man page for seq_hlist_start_head_rcu

SEQ_HLIST_START_HEAD(9) 					   The Linux VFS					   SEQ_HLIST_START_HEAD(9)

NAME
       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.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010						   SEQ_HLIST_START_HEAD(9)