typedef struct zio_eck {
grub_uint64_t zec_magic; /* for validation, endianness */
zio_cksum_t zec_cksum; /* 256-bit checksum */
-} __attribute__ ((packed)) zio_eck_t;
+} GRUB_PACKED zio_eck_t;
/*
* Gang block headers are self-checksumming and contain an array