* include/grub/i386/pc/kernel.h (grub_boot_drive): Change type to grub_uint8_t. (grub_root_drive): Likewise. * kern/i386/pc/startup.S (grub_boot_drive): Change size to byte, remove alignment. (grub_root_drive): Change size to byte. (grub_start_addr): Remove. (grub_end_addr): Likewise. (grub_apm_bios_info): Likewise.