tree: https://github.com/mchinth/linux  sep_socwatch_linux_5_9 head: 7296486889985b9d9895a39f551764a4b0425bea commit: e65547c5a9bb37e907edecece4da7cb12dadea96 [19/41] platform/x86: Use $(srctree) instead of $(src) to adapt to kbuild regression config: x86_64-randconfig-r016-20210413 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/mchinth/linux/commit/e65547c5a9bb37e907edecece4da7cb12... git remote add mchinth https://github.com/mchinth/linux git fetch --no-tags mchinth  sep_socwatch_linux_5_9 git checkout e65547c5a9bb37e907edecece4da7cb12dadea96 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): void reset_output_buffers(void) ^ drivers/platform/x86/socwatch/sw_output_buffer.c:398:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void reset_output_buffers(void) ^ static 1 warning generated. -- sw_copy_driver_interface_info_i(const struct sw_driver_interface_info *info) ^ drivers/platform/x86/socwatch/sw_collector.c:85:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct sw_driver_interface_info * ^ static int sw_init_driver_interface_info_i(struct sw_driver_interface_info *info) ^ drivers/platform/x86/socwatch/sw_collector.c:116:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int sw_init_driver_interface_info_i(struct sw_driver_interface_info *info) ^ static int sw_init_ops_i(const struct sw_hw_ops **ops, ^ drivers/platform/x86/socwatch/sw_collector.c:138:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int sw_init_ops_i(const struct sw_hw_ops **ops, ^ static size_t sw_get_payload_size_i(const struct sw_driver_interface_info *info) ^ drivers/platform/x86/socwatch/sw_collector.c:157:1: note: declare 'static' if the function is not intended to be used outside of this translation unit size_t sw_get_payload_size_i(const struct sw_driver_interface_info *info) ^ static sw_alloc_collector_msg_i(const struct sw_driver_interface_info *info, ^ drivers/platform/x86/socwatch/sw_collector.c:174:1: note: declare 'static' if the function is not intended to be used outside of this translation unit sw_driver_msg_t * ^ static const struct sw_hw_ops **sw_alloc_ops_i(pw_u16_t num_io_descriptors) ^ drivers/platform/x86/socwatch/sw_collector.c:211:7: note: declare 'static' if the function is not intended to be used outside of this translation unit const struct sw_hw_ops **sw_alloc_ops_i(pw_u16_t num_io_descriptors) ^ static void sw_free_driver_interface_info_i(struct sw_driver_interface_info *info) ^ drivers/platform/x86/socwatch/sw_collector.c:323:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sw_free_driver_interface_info_i(struct sw_driver_interface_info *info) ^ static void sw_free_ops_i(const struct sw_hw_ops **ops) ^ drivers/platform/x86/socwatch/sw_collector.c:329:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sw_free_ops_i(const struct sw_hw_ops **ops) ^ static int sw_reset_driver_interface_info_i(struct sw_driver_interface_info *info) ^ drivers/platform/x86/socwatch/sw_collector.c:335:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int sw_reset_driver_interface_info_i(struct sw_driver_interface_info *info) ^ static void sw_free_collector_msg_i(sw_driver_msg_t *msg) ^ drivers/platform/x86/socwatch/sw_collector.c:453:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sw_free_collector_msg_i(sw_driver_msg_t *msg) ^ static void sw_handle_per_cpu_msg_i(void *info, enum sw_wakeup_action action) ^ drivers/platform/x86/socwatch/sw_collector.c:459:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sw_handle_per_cpu_msg_i(void *info, enum sw_wakeup_action action) ^ static 11 warnings generated. -- drivers/platform/x86/socwatch/sw_telem.c:239:32: error: implicit declaration of function 'ioremap_nocache' [-Werror,-Wimplicit-function-declaration] s_punitInterfaceAddr = (u64 *)ioremap_nocache( ^ drivers/platform/x86/socwatch/sw_telem.c:239:32: note: did you mean 'ioremap_cache'? arch/x86/include/asm/io.h:185:22: note: 'ioremap_cache' declared here extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size); ^ drivers/platform/x86/socwatch/sw_telem.c:239:25: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_punitInterfaceAddr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/socwatch/sw_telem.c:242:20: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_punitDataAddr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/socwatch/sw_telem.c:245:50: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_telemEventInfo[TELEM_PUNIT].ssram_virt_addr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/socwatch/sw_telem.c:280:27: error: implicit declaration of function 'ioremap_nocache' [-Werror,-Wimplicit-function-declaration] s_pmcIPCCmdAddr = (u64 *)ioremap_nocache( ^ drivers/platform/x86/socwatch/sw_telem.c:280:20: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_pmcIPCCmdAddr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/socwatch/sw_telem.c:283:20: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_pmcIPCStsAddr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/socwatch/sw_telem.c:286:21: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_pmcIPCWBufAddr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/socwatch/sw_telem.c:289:21: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_pmcIPCRBufAddr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/platform/x86/socwatch/sw_telem.c:292:48: warning: cast to 'u64 *' (aka 'unsigned long long *') from smaller integer type 'int' [-Wint-to-pointer-cast] s_telemEventInfo[TELEM_PMC].ssram_virt_addr = (u64 *)ioremap_nocache( ^~~~~~~~~~~~~~~~~~~~~~~ int read_telem(u64 *dst, enum telemetry_unit unit, bool should_retry) ^ drivers/platform/x86/socwatch/sw_telem.c:671:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int read_telem(u64 *dst, enum telemetry_unit unit, bool should_retry) ^ static 9 warnings and 2 errors generated. vim +/reset_output_buffers +398 drivers/platform/x86/socwatch/sw_output_buffer.c 688e338c753b33c Faycal Benmlih 2019-04-23 397 688e338c753b33c Faycal Benmlih 2019-04-23 @398 void reset_output_buffers(void) 688e338c753b33c Faycal Benmlih 2019-04-23 399 { 688e338c753b33c Faycal Benmlih 2019-04-23 400 buffer.read_index = buffer.write_index = 0; 688e338c753b33c Faycal Benmlih 2019-04-23 401 } 688e338c753b33c Faycal Benmlih 2019-04-23 402 :::::: The code at line 398 was first introduced by commit :::::: 688e338c753b33c023de3b774f7347effbf537a4 Platform/x86: Update SoCWatch driver code to 2.10 :::::: TO: Faycal Benmlih <faycal.benmlih(a)intel.com&gt; :::::: CC: Faycal Benmlih <faycal.benmlih(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org