Christoph Biedl wrote... > This seems to help: (...) Not enough, additionally CONFIG_LOCKUP_DETECTOR has to be set, else the linker will fail: LD init/built-in.o arch/powerpc/platforms/built-in.o: In function `.pnv_setup_arch': setup.c:(.init.text+0x37ec): undefined reference to `.setup_rfi_flush' Makefile:976: recipe for target 'vmlinux' failed make[3]: *** [vmlinux] Error 1 Christoph