[kbuild-all] drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c:32:5: warning: no previous prototype for 'amdgpu_fru_read_eeprom'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 69119673bd50b176ded34032fadd41530fb5af21 commit: bd607166af7fe31f8d8e9c575f4561a4b56b9f24 drm/amdgpu: Enable reading FRU chip via I2C v3 date: 3 months ago config: ia64-randconfig-r012-20200617 (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 bd607166af7fe31f8d8e9c575f4561a4b56b9f24 # 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 warnings (new ones prefixed by >>, old ones prefixed by <<): 32 | int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr, | ^~~~~~~~~~~~~~~~~~~~~~ 69 | int amdgpu_fru_get_product_info(struct amdgpu_device *adev) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c:23: drivers/gpu/drm/amd/amdgpu/amdgpu.h:177:18: warning: 'sched_policy' defined but not used [-Wunused-const-variable=] 177 | static const int sched_policy = KFD_SCHED_POLICY_HWS; | ^~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:33, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:30, from drivers/gpu/drm/amd/amdgpu/../include/dm_pp_interface.h:26, from drivers/gpu/drm/amd/amdgpu/amdgpu.h:53, from drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c:23: drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:76:32: warning: 'dc_fixpt_ln2_div_2' defined but not used [-Wunused-const-variable=] 76 | static const struct fixed31_32 dc_fixpt_ln2_div_2 = { 1488522236LL }; | ^~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:75:32: warning: 'dc_fixpt_ln2' defined but not used [-Wunused-const-variable=] 75 | static const struct fixed31_32 dc_fixpt_ln2 = { 2977044471LL }; | ^~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:74:32: warning: 'dc_fixpt_e' defined but not used [-Wunused-const-variable=] 74 | static const struct fixed31_32 dc_fixpt_e = { 11674931555LL }; | ^~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:73:32: warning: 'dc_fixpt_two_pi' defined but not used [-Wunused-const-variable=] 73 | static const struct fixed31_32 dc_fixpt_two_pi = { 26986075409LL }; | ^~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:72:32: warning: 'dc_fixpt_pi' defined but not used [-Wunused-const-variable=] 72 | static const struct fixed31_32 dc_fixpt_pi = { 13493037705LL }; | ^~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:67:32: warning: 'dc_fixpt_zero' defined but not used [-Wunused-const-variable=] 67 | static const struct fixed31_32 dc_fixpt_zero = { 0 }; | ^~~~~~~~~~~~~ vim +/amdgpu_fru_read_eeprom +32 drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c 31 33 unsigned char *buff) 34 { 35 int ret, size; 36 struct i2c_msg msg = { 37 .addr = I2C_PRODUCT_INFO_ADDR, 38 .flags = I2C_M_RD, 39 .buf = buff, 40 }; 41 buff[0] = 0; 42 buff[1] = addrptr; 43 msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + 1; 44 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1); 45 46 if (ret < 1) { 47 DRM_WARN("FRU: Failed to get size field"); 48 return ret; 49 } 50 51 /* The size returned by the i2c requires subtraction of 0xC0 since the 52 * size apparently always reports as 0xC0+actual size. 53 */ 54 size = buff[2] - I2C_PRODUCT_INFO_OFFSET; 55 /* Add 1 since address field was 1 byte */ 56 buff[1] = addrptr + 1; 57 58 msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + size; 59 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1); 60 61 if (ret < 1) { 62 DRM_WARN("FRU: Failed to get data field"); 63 return ret; 64 } 65 66 return size; 67 } 68 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org