32     ACList*  prev;  member
39     list->next = list->prev = list;  in alist_init()
55     entry->prev = list;  in alist_insert_head()
56     next->prev = entry;  in alist_insert_head()
63     ACList* const prev = list->prev;  in alist_insert_tail()  local
65     entry->prev = prev;  in alist_insert_tail()
66     prev->next = entry;  in alist_insert_tail()
67     list->prev = entry;  in alist_insert_tail()
76     ACList* const prev = entry->prev;  in alist_remove()  local
77     prev->next = next;  in alist_remove()
78     next->prev = prev;  in alist_remove()
79     entry->next = entry->prev = entry;  in alist_remove()
91         entry->next->prev = list;  in alist_remove_head()
92         entry->next = entry->prev = entry;  in alist_remove_head()
104         entry = list->prev;  in alist_remove_tail()
105         list->prev = entry->prev;  in alist_remove_tail()
106         entry->prev->next = list;  in alist_remove_tail()
107         entry->next = entry->prev = entry;  in alist_remove_tail()