list_empty_careful (9) Linux Manual Page
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.