Hi Sumit, kernel test robot noticed the following build errors: [auto build test ERROR on rafael-pm/linux-next] [also build test ERROR on rafael-pm/bleeding-edge linus/master v6.17-rc3 next-20250825] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Sumit-Gupta/ACPI-CPPC-add-perf-control-read-API-and-clarify-naming/20250824-040531 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next patch link: https://lore.kernel.org/r/20250823200121.1320197-2-sumitg%40nvidia.com patch subject: [PATCH v2 1/7] ACPI: CPPC: add perf control read API and clarify naming config: x86_64-kexec (https://download.01.org/0day-ci/archive/20250826/202508260711.I7imWLTG-lkp@xxxxxxxxx/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250826/202508260711.I7imWLTG-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202508260711.I7imWLTG-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> drivers/cpufreq/amd-pstate.c:524:8: error: call to undeclared function 'cppc_set_perf'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 524 | ret = cppc_set_perf(cpudata->cpu, &perf_ctrls); | ^ drivers/cpufreq/amd-pstate.c:524:8: note: did you mean 'cppc_set_epp'? include/acpi/cppc_acpi.h:170:12: note: 'cppc_set_epp' declared here 170 | extern int cppc_set_epp(int cpu, u64 epp_val); | ^ 1 error generated. vim +/cppc_set_perf +524 drivers/cpufreq/amd-pstate.c e059c184da47e9 Huang Rui 2021-12-24 480 77fbea69b0ffad Mario Limonciello 2024-12-09 481 static int shmem_update_perf(struct cpufreq_policy *policy, u8 min_perf, 555bbe67a622b2 Dhananjay Ugwekar 2025-02-05 482 u8 des_perf, u8 max_perf, u8 epp, bool fast_switch) e059c184da47e9 Huang Rui 2021-12-24 483 { 77fbea69b0ffad Mario Limonciello 2024-12-09 484 struct amd_cpudata *cpudata = policy->driver_data; e059c184da47e9 Huang Rui 2021-12-24 485 struct cppc_perf_ctrls perf_ctrls; 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 486 u64 value, prev; 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 487 int ret; e059c184da47e9 Huang Rui 2021-12-24 488 fff395796917ac Mario Limonciello 2024-12-09 489 if (cppc_state == AMD_PSTATE_ACTIVE) { 77fbea69b0ffad Mario Limonciello 2024-12-09 490 int ret = shmem_set_epp(policy, epp); fff395796917ac Mario Limonciello 2024-12-09 491 fff395796917ac Mario Limonciello 2024-12-09 492 if (ret) fff395796917ac Mario Limonciello 2024-12-09 493 return ret; fff395796917ac Mario Limonciello 2024-12-09 494 } fff395796917ac Mario Limonciello 2024-12-09 495 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 496 value = prev = READ_ONCE(cpudata->cppc_req_cached); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 497 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 498 value &= ~(AMD_CPPC_MAX_PERF_MASK | AMD_CPPC_MIN_PERF_MASK | 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 499 AMD_CPPC_DES_PERF_MASK | AMD_CPPC_EPP_PERF_MASK); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 500 value |= FIELD_PREP(AMD_CPPC_MAX_PERF_MASK, max_perf); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 501 value |= FIELD_PREP(AMD_CPPC_DES_PERF_MASK, des_perf); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 502 value |= FIELD_PREP(AMD_CPPC_MIN_PERF_MASK, min_perf); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 503 value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 504 77fbea69b0ffad Mario Limonciello 2024-12-09 505 if (trace_amd_pstate_epp_perf_enabled()) { 77fbea69b0ffad Mario Limonciello 2024-12-09 506 union perf_cached perf = READ_ONCE(cpudata->perf); 77fbea69b0ffad Mario Limonciello 2024-12-09 507 77fbea69b0ffad Mario Limonciello 2024-12-09 508 trace_amd_pstate_epp_perf(cpudata->cpu, 77fbea69b0ffad Mario Limonciello 2024-12-09 509 perf.highest_perf, 77fbea69b0ffad Mario Limonciello 2024-12-09 510 epp, 77fbea69b0ffad Mario Limonciello 2024-12-09 511 min_perf, 77fbea69b0ffad Mario Limonciello 2024-12-09 512 max_perf, 77fbea69b0ffad Mario Limonciello 2024-12-09 513 policy->boost_enabled, 77fbea69b0ffad Mario Limonciello 2024-12-09 514 value != prev); 77fbea69b0ffad Mario Limonciello 2024-12-09 515 } 77fbea69b0ffad Mario Limonciello 2024-12-09 516 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 517 if (value == prev) 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 518 return 0; 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 519 e059c184da47e9 Huang Rui 2021-12-24 520 perf_ctrls.max_perf = max_perf; e059c184da47e9 Huang Rui 2021-12-24 521 perf_ctrls.min_perf = min_perf; e059c184da47e9 Huang Rui 2021-12-24 522 perf_ctrls.desired_perf = des_perf; e059c184da47e9 Huang Rui 2021-12-24 523 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 @524 ret = cppc_set_perf(cpudata->cpu, &perf_ctrls); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 525 if (ret) 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 526 return ret; 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 527 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 528 WRITE_ONCE(cpudata->cppc_req_cached, value); 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 529 9f5daa2f2f6ddd Mario Limonciello 2024-12-09 530 return 0; e059c184da47e9 Huang Rui 2021-12-24 531 } e059c184da47e9 Huang Rui 2021-12-24 532 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
