Hi Roman, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/linux-next] [also build test ERROR on v4.15-rc2] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Roman-Kagan/x86-kvm-hyperv-guest-host-event-signaling-via-eventfd/20171207-065837 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: i386-randconfig-x011-201749 (attached as .config) compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025 reproduce: # save the attached .config to linux build tree make ARCH=i386 All error/warnings (new ones prefixed by >>): In file included from include/linux/init.h:5:0, from arch/x86/include/asm/mem_encrypt.h:18, from include/linux/mem_encrypt.h:20, from arch/x86/include/asm/processor-flags.h:6, from arch/x86/include/asm/processor.h:5, from arch/x86//kvm/x86.h:5, from arch/x86//kvm/hyperv.c:24: arch/x86//kvm/hyperv.c: In function 'hvcall_sigevent_param': >> arch/x86//kvm/hyperv.c:1236:26: error: dereferencing pointer to incomplete type 'struct hv_input_signal_event' if ((gpa & (__alignof__(*msg) - 1)) || ^~ include/linux/compiler.h:58:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> arch/x86//kvm/hyperv.c:1236:2: note: in expansion of macro 'if' if ((gpa & (__alignof__(*msg) - 1)) || ^~ vim +1236 arch/x86//kvm/hyperv.c 1229 1230 static u16 hvcall_sigevent_param(struct kvm_vcpu *vcpu, gpa_t gpa, u32 *conn_id) 1231 { 1232 struct page *page; 1233 void *pg; 1234 struct hv_input_signal_event *msg; 1235 > 1236 if ((gpa & (__alignof__(*msg) - 1)) || 1237 offset_in_page(gpa) + sizeof(*msg) > PAGE_SIZE) 1238 return HV_STATUS_INVALID_ALIGNMENT; 1239 1240 page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); 1241 if (is_error_page(page)) 1242 return HV_STATUS_INSUFFICIENT_MEMORY; 1243 1244 pg = kmap_atomic(page); 1245 msg = pg + offset_in_page(gpa); 1246 *conn_id = msg->connectionid.u.id + msg->flag_number; 1247 kunmap_atomic(pg); 1248 return HV_STATUS_SUCCESS; 1249 } 1250 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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