The grub_efi_pxe_t struct definition has placeholders for the various protocol method pointers, given that they are never called in the code, and the prototypes have been omitted, and therefore do not comply with the UEFI spec. So let's convert them into void* pointers, so they cannot be called inadvertently. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>