__u32 boot_cksum; /* boot code checksum */
uchar processor[16]; /* Type of Processor */
__u16 part_pad[188]; /* reserved */
-#ifdef CONFIG_ISO_PARTITION
+#if CONFIG_IS_ENABLED(ISO_PARTITION)
uchar iso_dummy[2048];/* Reservere enough room for an ISO partition block to fit */
#endif
} mac_partition_t;