check_prev_entry
ptr = &check_prev_entry;
MT_BUG_ON(mt, ptr != &check_prev_entry);
ptr = &check_prev_entry;
MT_BUG_ON(mt, ptr != &check_prev_entry);
ptr = (void *)((unsigned long) check_prev_entry | 1UL);
MT_BUG_ON(mt, ptr != (void *)((unsigned long) check_prev_entry | 1UL));
ptr = (void *)((unsigned long) check_prev_entry | 2UL);
MT_BUG_ON(mt, ptr != (void *)((unsigned long) check_prev_entry | 2UL));
check_prev_entry(&tree);