55 	if ((c = (int *)va_arg(ap, uintptr_t)) == NULL)  in API_getc()
71 	if ((t = (int *)va_arg(ap, uintptr_t)) == NULL)  in API_tstc()
87 	if ((c = (char *)va_arg(ap, uintptr_t)) == NULL)  in API_putc()
103 	if ((s = (char *)va_arg(ap, uintptr_t)) == NULL)  in API_puts()
117 	do_reset(NULL, 0, 0, NULL);  in API_reset()
136 	if (si == NULL)  in API_get_sys_info()
151 	if ((d = (unsigned long *)va_arg(ap, unsigned long)) == NULL)  in API_udelay()
168 	if (cur == NULL)  in API_get_timer()
172 	if (base == NULL)  in API_get_timer()
203 	if (di == NULL)  in API_dev_enum()
206 	if (di->cookie == NULL) {  in API_dev_enum()
224 		di->cookie = NULL;  in API_dev_enum()
237 	if (di == NULL)  in API_dev_open()
244 	if (di->cookie == NULL)  in API_dev_open()
269 	if (di == NULL)  in API_dev_close()
275 	if (di->cookie == NULL)  in API_dev_close()
323 	if (di == NULL)  in API_dev_write()
328 	if (di->cookie == NULL)  in API_dev_write()
333 	if (buf == NULL)  in API_dev_write()
338 	if (len == NULL)  in API_dev_write()
391 	if (di == NULL)  in API_dev_read()
396 	if (di->cookie == NULL)  in API_dev_read()
401 	if (buf == NULL)  in API_dev_read()
456 	if ((name = (char *)va_arg(ap, uintptr_t)) == NULL)  in API_env_get()
458 	if ((value = (char **)va_arg(ap, uintptr_t)) == NULL)  in API_env_get()
479 	if ((name = (char *)va_arg(ap, uintptr_t)) == NULL)  in API_env_set()
481 	if ((value = (char *)va_arg(ap, uintptr_t)) == NULL)  in API_env_set()
505 	if ((next = (char **)va_arg(ap, uintptr_t)) == NULL)  in API_env_enum()
508 	if (last == NULL) {  in API_env_enum()
509 		var = NULL;  in API_env_enum()
514 		if (s != NULL)  in API_env_enum()
536 	var = NULL;  in API_env_enum()
537 	*next = NULL;  in API_env_enum()
585 static cfp_t calls_table[API_MAXCALL] = { NULL, };
613 	if (calls_table[call] == NULL) {  in syscall()
620 	if (retval != NULL)  in syscall()
631 	calls_table[API_RSVD] = NULL;  in api_init()
661 	if (sig == NULL) {  in api_init()