list_empty_careful(9)
NAME
list_empty_careful - tests whether a list is empty and not being
modified
SYNOPSIS
int list_empty_careful(const struct list_head * head);
ARGUMENTS
- head
- the list to test
DESCRIPTION
tests whether a list is empty _and_ checks that no other CPU might be
in the process of modifying either member (next or prev)
NOTE
using list_empty_careful without synchronization can only be safe if the only activity that can happen to the list entry is list_del_init. Eg. it cannot be used if another CPU could re-list_add it.