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: 3f3c5417231f180b2f0fba968caa91979cb6e3f0 [17/19] x86, msi: Introduce x86_msi.compose_msi_msg call-back config: i386-randconfig-b732 (attached as .config) All related error/warning messages: arch/x86/built-in.o:(.data+0x288): undefined reference to `native_compose_msi_msg' i386-randconfig-b731 all accumulated errors: arch/x86/kernel/x86_init.c:118:21: error: 'native_compose_msi_msg' undeclared here (not in a function) arch/x86/kernel/x86_init.c:130:14: error: 'native_disable_io_apic' undeclared here (not in a function) arch/x86/kernel/x86_init.c:131:20: error: 'native_io_apic_print_entries' undeclared here (not in a function) arch/x86/kernel/x86_init.c:133:18: error: 'native_setup_ioapic_entry' undeclared here (not in a function) arch/x86/kernel/x86_init.c:134:21: error: 'native_setup_timer_pin' undeclared here (not in a function) --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation