Hi Joerg, FYI, kernel build failed on tree: git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git ioapic-cleanups head: 25b140f9d56483def20a4a6cd54766a55508c132 commit: 4bdad0620f415dc86f64773af3dea6bead46be92 [3/19] x86, io_apic: Introduce x86_io_apic_ops.disable() config: i386-randconfig-b731 (attached as .config) All related error/warning messages: arch/x86/kernel/x86_init.c:127:14: error: 'native_disable_io_apic' undeclared here (not in a function) vim +127 arch/x86/kernel/x86_init.c 124 .read = native_io_apic_read, 125 .write = native_io_apic_write, 126 .modify = native_io_apic_modify, > 127 .disable = native_disable_io_apic, 128 }; --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation