Hi, [auto build test ERROR on pm/linux-next] [also build test ERROR on v4.6-rc4 next-20160419] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Sudeep-Holla/ACPI-processor_idle-Add-ACPI-v6-0-LPI-support/20160419-203500 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: i386-randconfig-x000-201616 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: the linux-review/Sudeep-Holla/ACPI-processor_idle-Add-ACPI-v6-0-LPI-support/20160419-203500 HEAD c51fc2a756d7b0dce908a4ca043d1d458c400af5 builds fine. It only hurts bisectibility. All error/warnings (new ones prefixed by >>): drivers/acpi/processor_idle.c: In function 'acpi_processor_cstate_first_run_checks': >> drivers/acpi/processor_idle.c:943:3: error: 'status' undeclared (first use in this function) status = acpi_os_write_port(acpi_gbl_FADT.smi_command, ^ drivers/acpi/processor_idle.c:943:3: note: each undeclared identifier is reported only once for each function it appears in drivers/acpi/processor_idle.c: In function 'acpi_processor_power_init': >> drivers/acpi/processor_idle.c:1062:14: warning: unused variable 'status' [-Wunused-variable] acpi_status status; ^ vim +/status +943 drivers/acpi/processor_idle.c 937 if (max_cstate < ACPI_C_STATES_MAX) 938 pr_notice("ACPI: processor limited to max C-state %d\n", 939 max_cstate); 940 first_run++; 941 942 if (acpi_gbl_FADT.cst_control && !nocst) { > 943 status = acpi_os_write_port(acpi_gbl_FADT.smi_command, 944 acpi_gbl_FADT.cst_control, 8); 945 if (ACPI_FAILURE(status)) 946 ACPI_EXCEPTION((AE_INFO, status, 947 "Notifying BIOS of _CST ability failed")); 948 } 949 } 950 #else 951 952 static inline int disabled_by_idle_boot_param(void) { return 0; } 953 static inline void acpi_processor_cstate_first_run_checks(void) { } 954 static int acpi_processor_get_power_info(struct acpi_processor *pr) 955 { 956 return -ENODEV; 957 } 958 959 static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr, 960 struct cpuidle_device *dev) 961 { 962 return -EINVAL; 963 } 964 965 static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr) 966 { 967 return -EINVAL; 968 } 969 970 #endif 971 972 int acpi_processor_hotplug(struct acpi_processor *pr) 973 { 974 int ret = 0; 975 struct cpuidle_device *dev; 976 977 if (disabled_by_idle_boot_param()) 978 return 0; 979 980 if (nocst) 981 return -ENODEV; 982 983 if (!pr->flags.power_setup_done) 984 return -ENODEV; 985 986 dev = per_cpu(acpi_cpuidle_device, pr->id); 987 cpuidle_pause_and_lock(); 988 cpuidle_disable_device(dev); 989 acpi_processor_get_power_info(pr); 990 if (pr->flags.power) { 991 acpi_processor_setup_cpuidle_cx(pr, dev); 992 ret = cpuidle_enable_device(dev); 993 } 994 cpuidle_resume_and_unlock(); 995 996 return ret; 997 } 998 999 int acpi_processor_cst_has_changed(struct acpi_processor *pr) 1000 { 1001 int cpu; 1002 struct acpi_processor *_pr; 1003 struct cpuidle_device *dev; 1004 1005 if (disabled_by_idle_boot_param()) 1006 return 0; 1007 1008 if (nocst) 1009 return -ENODEV; 1010 1011 if (!pr->flags.power_setup_done) 1012 return -ENODEV; 1013 1014 /* 1015 * FIXME: Design the ACPI notification to make it once per 1016 * system instead of once per-cpu. This condition is a hack 1017 * to make the code that updates C-States be called once. 1018 */ 1019 1020 if (pr->id == 0 && cpuidle_get_driver() == &acpi_idle_driver) { 1021 1022 /* Protect against cpu-hotplug */ 1023 get_online_cpus(); 1024 cpuidle_pause_and_lock(); 1025 1026 /* Disable all cpuidle devices */ 1027 for_each_online_cpu(cpu) { 1028 _pr = per_cpu(processors, cpu); 1029 if (!_pr || !_pr->flags.power_setup_done) 1030 continue; 1031 dev = per_cpu(acpi_cpuidle_device, cpu); 1032 cpuidle_disable_device(dev); 1033 } 1034 1035 /* Populate Updated C-state information */ 1036 acpi_processor_get_power_info(pr); 1037 acpi_processor_setup_cpuidle_states(pr); 1038 1039 /* Enable all cpuidle devices */ 1040 for_each_online_cpu(cpu) { 1041 _pr = per_cpu(processors, cpu); 1042 if (!_pr || !_pr->flags.power_setup_done) 1043 continue; 1044 acpi_processor_get_power_info(_pr); 1045 if (_pr->flags.power) { 1046 dev = per_cpu(acpi_cpuidle_device, cpu); 1047 acpi_processor_setup_cpuidle_cx(_pr, dev); 1048 cpuidle_enable_device(dev); 1049 } 1050 } 1051 cpuidle_resume_and_unlock(); 1052 put_online_cpus(); 1053 } 1054 1055 return 0; 1056 } 1057 1058 static int acpi_processor_registered; 1059 1060 int acpi_processor_power_init(struct acpi_processor *pr) 1061 { > 1062 acpi_status status; 1063 int retval; 1064 struct cpuidle_device *dev; 1065 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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