compat_floppy_write_errors
#define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)
struct compat_floppy_write_errors __user *arg)
struct compat_floppy_write_errors v32;
memset(&v32, 0, sizeof(struct compat_floppy_write_errors));
if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_write_errors)))