This is a neverending story
linux/acpi.h contains empty declarations for acpi_boot_init() &
acpi_boot_table_init() but they are nested inside #ifdef CONFIG_ACPI.
So we'll have to #ifdef in arch/i386/kernel/setup.c: setup_arch()
Signed-off-by: Alexander Nyberg <alexn@telia.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
        if (efi_enabled)
                efi_map_memmap();
 
+#ifdef CONFIG_ACPI_BOOT
        /*
         * Parse the ACPI tables for possible boot-time SMP configuration.
         */
        acpi_boot_table_init();
        acpi_boot_init();
+#endif
 
 #ifdef CONFIG_X86_LOCAL_APIC
        if (smp_found_config)