cmd_tbl_t *find_cmd(const char *cmd);
cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len);
-extern void cmd_usage(cmd_tbl_t *cmdtp);
+extern int cmd_usage(cmd_tbl_t *cmdtp);
#ifdef CONFIG_AUTO_COMPLETE
extern void install_auto_complete(void);