module_param(my_integer_parameter, int, S_IRUSR | S_IWUSR ); 
MODULE_PARM_DESC(my_integer_parameter, "An integer parameter");
module_param(my_string_parameter, charp, S_IRUSR | 
                                  S_IWUSR | S_IRGRP | S_IROTH);
MODULE_PARM_DESC(my_string_parameter, "A character string parameter");

Example 1: Declaration of an integer and a string parameter.