Output form "make bzImage": kallsyms pass 1 ld -m elf_i386 -T /usr/src/linux-2.4.22-1.2115.nptl/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/main.o init/version.o init/do_mounts.o --start-group arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o drivers/acpi/acpi.o drivers/cpufreq/cpufreq.o drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/char/drm/drm.o drivers/net/fc/fc.o drivers/net/appletalk/appletalk.o drivers/net/tokenring/tr.o drivers/net/wan/wan.o drivers/atm/atm.o drivers/ide/idedriver.o drivers/cdrom/driver.o drivers/pci/driver.o drivers/net/pcmcia/pcmcia_net.o drivers/net/wireless/wireless_net.o drivers/pnp/pnp.o drivers/video/video.o drivers/media/media.o drivers/md/mddev.o drivers/isdn/vmlinux-obj.o drivers/sensors/sensor.o net/network.o /usr/src/linux-2.4.22-1.2115.nptl/arch/i386/lib/lib.a /usr/src/linux-2.4.22-1.2115.nptl/lib/lib.a /usr/src/linux-2.4.22-1.2115.nptl/arch/i386/lib/lib.a --end-group -o .tmp_vmlinux1 kernel/kernel.o(.text+0xfc3): In function `schedule': : undefined reference to `active_load_balance' make[1]: *** [kallsyms] Error 1 make[1]: Leaving directory `/usr/src/linux-2.4.22-1.2115.nptl' make: *** [vmlinux] Error 2 Any ideas why this error occurs even with the original non SMP kernel configuration?