compat_floppy_struct
#define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
#define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
unsigned int cmd, struct compat_floppy_struct __user *arg)
offsetof(struct compat_floppy_struct, name));
struct compat_floppy_struct __user *arg)
struct compat_floppy_struct v;
if (copy_to_user(arg, &v, sizeof(struct compat_floppy_struct)))
#define FDGETPRM32 _IOR(2, 0x04, struct compat_floppy_struct)