call_usermodehelper_exec
if (call_usermodehelper_exec(sub_info, UMH_WAIT_EXEC)) {
call_usermodehelper_exec(struct subprocess_info *info, int wait);
ret = call_usermodehelper_exec(info, wait | UMH_KILLABLE);
EXPORT_SYMBOL(call_usermodehelper_exec);
return call_usermodehelper_exec(info, wait);
retval = call_usermodehelper_exec(info, UMH_NO_WAIT);
return call_usermodehelper_exec(info, wait);