Hi, [auto build test WARNING on pm/linux-next] [also build test WARNING on v4.7 next-20160726] [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/Rui-Wang/Fixing-a-set-of-bugs-for-ioapic-hotplug/20160727-003628 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: x86_64-randconfig-x015-201630 (attached as .config) compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/acpi/ioapic.c: In function 'handle_ioapic_add': >> drivers/acpi/ioapic.c:159:18: warning: 'pci_res' may be used uninitialized in this function [-Wmaybe-uninitialized] if (!res || !res->flags) ~~~^~~~~~~ vim +/pci_res +159 drivers/acpi/ioapic.c 143 pci_dev_put(dev); 144 dev = NULL; 145 } 146 147 crs_res = &ioapic->res; 148 acpi_walk_resources(handle, METHOD_NAME__CRS, setup_res, crs_res); 149 if (crs_res->flags == 0) { 150 acpi_handle_warn(handle, "failed to get resource\n"); 151 goto exit_release; 152 } else if (request_resource(&iomem_resource, crs_res)) { 153 acpi_handle_warn(handle, "failed to insert resource\n"); 154 goto exit_release; 155 } 156 157 /* try pci resource first, then "_CRS" resource */ 158 res = pci_res; > 159 if (!res || !res->flags) 160 res = crs_res; 161 162 if (acpi_register_ioapic(handle, res->start, (u32)gsi_base)) { 163 acpi_handle_warn(handle, "failed to register IOAPIC\n"); 164 goto exit_release; 165 } 166 done: 167 list_add(&ioapic->list, &ioapic_list); --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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