drivers/acpi/blacklist.c: In function ‘blacklist_by_year’:
drivers/acpi/blacklist.c:82: error: ‘efi_enabled’ undeclared (first use in this function)
drivers/acpi/blacklist.c:82: error: (Each undeclared identifier is reported only once
drivers/acpi/blacklist.c:82: error: for each function it appears in.)
make[2]: *** [drivers/acpi/blacklist.o] Error 1
make[1]: *** [drivers/acpi] Error 2
make: *** [drivers] Error 2