Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
                lock_ac_dir_cnt--;
        if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) {
                remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
-               acpi_ac_dir = 0;
+               acpi_ac_dir = NULL;
        }
        mutex_unlock(&cm_sbs_mutex);
 }
        if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param
            && acpi_battery_dir) {
                remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
-               acpi_battery_dir = 0;
+               acpi_battery_dir = NULL;
        }
        mutex_unlock(&cm_sbs_mutex);
        return;