-extern command_ret_t do_mem_md(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_mm(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_nm(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_mw(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_cp(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_cmp(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_base(cmd_tbl_t *, int, int, char * const []);
-extern command_ret_t do_mem_loop(cmd_tbl_t *, int, int, char * const []);
-#ifdef CONFIG_LOOPW
-extern command_ret_t do_mem_loopw(cmd_tbl_t *, int, int, char * const []);
-#endif
+command_ret_t do_mem_size(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_md(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_mm(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_nm(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_mw(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_cp(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_cmp(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_base(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_loop(cmd_tbl_t *, uint_fast8_t, int, char * const []);
+command_ret_t do_mem_loopw(cmd_tbl_t *, uint_fast8_t, int, char * const []);