Hello everybody, I'm trying to build a UML machine on x86-64 (config attached) but I'm getting compile errors. What am I doing wrong? make allnoconfig ARCH=um make menuconfig ARCH=um selected a few options make -j 5 ARCH=um .. include/linux/jiffies.h:225:31: error: division by zero in #if include/linux/jiffies.h:225:46: warning: "SHIFT_HZ" is not defined In file included from arch/um/include/sysdep/kernel-offsets.h:2, from arch/um/kernel/asm-offsets.c:1: include/linux/sched.h: In function 'dequeue_signal_lock': include/linux/sched.h:1506: error: implicit declaration of function 'local_irq_save' include/linux/sched.h:1508: error: implicit declaration of function 'local_irq_restore' In file included from include/linux/crypto.h:21, from arch/um/include/sysdep/kernel-offsets.h:5, from arch/um/kernel/asm-offsets.c:1: include/linux/module.h: At top level: include/linux/module.h:222: error: requested alignment is not a constant In file included from arch/um/kernel/asm-offsets.c:1: arch/um/include/sysdep/kernel-offsets.h:25:29: error: asm/arch/unistd.h: No such file or directory In file included from arch/um/include/sysdep/kernel-offsets.h:30, from arch/um/kernel/asm-offsets.c:1: arch/um/include/common-offsets.h: In function 'foo': arch/um/include/common-offsets.h:8: error: 'struct thread_struct' has no member named 'regs' make[1]: *** [arch/um/kernel/asm-offsets.s] Error 1 make: *** [prepare0] Error 2 Thank you for all help. Regards, Phil -- Versioning your /etc, /home or even your whole installation? Try fsvs (fsvs.tigris.org)!