fiodgname_arg
struct fiodgname_arg fgn;
struct fiodgname_arg *fgn;
struct fiodgname_arg fgn;
struct fiodgname_arg *fgn;
struct fiodgname_arg *fgn;
#define FIODGNAME _IOW('f', 120, struct fiodgname_arg) /* get dev. name */