Hi Wendy, FYI, the error/warning still remains. tree: https://github.com/Xilinx/linux-xlnx master head: ac4c486937b8f9eebf15b12ebb6bbf75b6d36f09 commit: b4164ed1bbab5999a8b30dc25eaaa3200ff1fe59 [10/78] misc: ai-engine: Move AI engine reg access to kernel config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 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 git checkout b4164ed1bbab5999a8b30dc25eaaa3200ff1fe59 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from drivers/misc/xilinx-ai-engine/ai-engine-dev.c:17: 128 | static inline initcall_t __maybe_unused __inittest(void) \ | ^~~~~~~~~~ include/linux/device.h:1903:1: note: in expansion of macro 'module_init' 1903 | module_init(__driver##_init); \ | ^~~~~~~~~~~ include/linux/platform_device.h:238:2: note: in expansion of macro 'module_driver' 238 | module_driver(__platform_driver, platform_driver_register, \ | ^~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:426:1: note: in expansion of macro 'module_platform_driver' 426 | module_platform_driver(xilinx_ai_engine_driver); | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/module.h:128:42: note: previous definition of '__inittest' was here 128 | static inline initcall_t __maybe_unused __inittest(void) \ | ^~~~~~~~~~ include/linux/module.h:111:32: note: in expansion of macro 'module_init' 111 | #define postcore_initcall(fn) module_init(fn) | ^~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:417:1: note: in expansion of macro 'postcore_initcall' 417 | postcore_initcall(xilinx_ai_engine_init); | ^~~~~~~~~~~~~~~~~ 130 | int init_module(void) __copy(initfn) __attribute__((alias(#initfn))); | ^~~~~~~~~~~ include/linux/device.h:1903:1: note: in expansion of macro 'module_init' 1903 | module_init(__driver##_init); \ | ^~~~~~~~~~~ include/linux/platform_device.h:238:2: note: in expansion of macro 'module_driver' 238 | module_driver(__platform_driver, platform_driver_register, \ | ^~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:426:1: note: in expansion of macro 'module_platform_driver' 426 | module_platform_driver(xilinx_ai_engine_driver); | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/module.h:130:6: note: previous definition of 'init_module' was here 130 | int init_module(void) __copy(initfn) __attribute__((alias(#initfn))); | ^~~~~~~~~~~ include/linux/module.h:111:32: note: in expansion of macro 'module_init' 111 | #define postcore_initcall(fn) module_init(fn) | ^~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:417:1: note: in expansion of macro 'postcore_initcall' 417 | postcore_initcall(xilinx_ai_engine_init); | ^~~~~~~~~~~~~~~~~ 134 | static inline exitcall_t __maybe_unused __exittest(void) \ | ^~~~~~~~~~ include/linux/device.h:1908:1: note: in expansion of macro 'module_exit' 1908 | module_exit(__driver##_exit); | ^~~~~~~~~~~ include/linux/platform_device.h:238:2: note: in expansion of macro 'module_driver' 238 | module_driver(__platform_driver, platform_driver_register, \ | ^~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:426:1: note: in expansion of macro 'module_platform_driver' 426 | module_platform_driver(xilinx_ai_engine_driver); | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/module.h:134:42: note: previous definition of '__exittest' was here 134 | static inline exitcall_t __maybe_unused __exittest(void) \ | ^~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:424:1: note: in expansion of macro 'module_exit' 424 | module_exit(xilinx_ai_engine_exit); | ^~~~~~~~~~~ 136 | void cleanup_module(void) __copy(exitfn) __attribute__((alias(#exitfn))); | ^~~~~~~~~~~~~~ include/linux/device.h:1908:1: note: in expansion of macro 'module_exit' 1908 | module_exit(__driver##_exit); | ^~~~~~~~~~~ include/linux/platform_device.h:238:2: note: in expansion of macro 'module_driver' 238 | module_driver(__platform_driver, platform_driver_register, \ | ^~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:426:1: note: in expansion of macro 'module_platform_driver' 426 | module_platform_driver(xilinx_ai_engine_driver); | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/module.h:136:7: note: previous definition of 'cleanup_module' was here 136 | void cleanup_module(void) __copy(exitfn) __attribute__((alias(#exitfn))); | ^~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:424:1: note: in expansion of macro 'module_exit' 424 | module_exit(xilinx_ai_engine_exit); | ^~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c: In function 'aie_request_partition_from_id': drivers/misc/xilinx-ai-engine/ai-engine-dev.c:165:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 165 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:175:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 175 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c: In function 'aie_enquire_partitions': drivers/misc/xilinx-ai-engine/ai-engine-dev.c:97:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 97 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/__inittest +128 include/linux/module.h 0fd972a7d91d6e Paul Gortmaker 2015-05-01 125 0fd972a7d91d6e Paul Gortmaker 2015-05-01 126 /* Each module must use one module_init(). */ 0fd972a7d91d6e Paul Gortmaker 2015-05-01 127 #define module_init(initfn) \ 1f318a8bafcfba Arnd Bergmann 2017-02-01 @128 static inline initcall_t __maybe_unused __inittest(void) \ 0fd972a7d91d6e Paul Gortmaker 2015-05-01 129 { return initfn; } \ a6e60d84989fa0 Miguel Ojeda 2019-01-19 @130 int init_module(void) __copy(initfn) __attribute__((alias(#initfn))); 0fd972a7d91d6e Paul Gortmaker 2015-05-01 131 0fd972a7d91d6e Paul Gortmaker 2015-05-01 132 /* This is only required if you want to be unloadable. */ 0fd972a7d91d6e Paul Gortmaker 2015-05-01 133 #define module_exit(exitfn) \ 1f318a8bafcfba Arnd Bergmann 2017-02-01 @134 static inline exitcall_t __maybe_unused __exittest(void) \ 0fd972a7d91d6e Paul Gortmaker 2015-05-01 135 { return exitfn; } \ a6e60d84989fa0 Miguel Ojeda 2019-01-19 @136 void cleanup_module(void) __copy(exitfn) __attribute__((alias(#exitfn))); 0fd972a7d91d6e Paul Gortmaker 2015-05-01 137 :::::: The code at line 128 was first introduced by commit :::::: 1f318a8bafcfba9f0d623f4870c4e890fd22e659 modules: mark __inittest/__exittest as __maybe_unused :::::: TO: Arnd Bergmann <arnd(a)arndb.de&gt; :::::: CC: Jessica Yu <jeyu(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org