[kbuild-all] [agd5f:amd-staging-drm-next 1836/1993] drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c:56:6: warning: no previous prototype for 'mmhub_v1_7_setup_vm_pt_regs'

tree: https://gitlab.freedesktop.org/agd5f/linux.git amd-staging-drm-next head: dec2310256916626e4356af784822e02fb807cad commit: f6c26889a8c072249ea310c6287fa6d82d958baf [1836/1993] drm/amdgpu: Clean up mmhub functions for aldebaran config: arm64-allyesconfig (attached as .config) compiler: aarch64-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 remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git git fetch --no-tags agd5f amd-staging-drm-next git checkout f6c26889a8c072249ea310c6287fa6d82d958baf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 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 >>): 56 | void mmhub_v1_7_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/mmhub_v1_7_setup_vm_pt_regs +56 drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c de4ff39913de1188 Le Ma 2020-09-05 55 de4ff39913de1188 Le Ma 2020-09-05 @56 void mmhub_v1_7_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid, de4ff39913de1188 Le Ma 2020-09-05 57 uint64_t page_table_base) de4ff39913de1188 Le Ma 2020-09-05 58 { de4ff39913de1188 Le Ma 2020-09-05 59 /* two registers distance between regVM_CONTEXT0_* to regVM_CONTEXT1_* */ de4ff39913de1188 Le Ma 2020-09-05 60 int offset = regVM_CONTEXT1_PAGE_TABLE_BASE_ADDR_LO32 de4ff39913de1188 Le Ma 2020-09-05 61 - regVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32; de4ff39913de1188 Le Ma 2020-09-05 62 de4ff39913de1188 Le Ma 2020-09-05 63 WREG32_SOC15_OFFSET(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32, de4ff39913de1188 Le Ma 2020-09-05 64 offset * vmid, lower_32_bits(page_table_base)); de4ff39913de1188 Le Ma 2020-09-05 65 de4ff39913de1188 Le Ma 2020-09-05 66 WREG32_SOC15_OFFSET(MMHUB, 0, regVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32, de4ff39913de1188 Le Ma 2020-09-05 67 offset * vmid, upper_32_bits(page_table_base)); de4ff39913de1188 Le Ma 2020-09-05 68 } de4ff39913de1188 Le Ma 2020-09-05 69 :::::: The code at line 56 was first introduced by commit :::::: de4ff39913de118860061548876f4e2fcfb6c3e2 drm/amdgpu: add mmhub support for aldebaran (v3) :::::: TO: Le Ma <le.ma(a)amd.com&gt; :::::: CC: Alex Deucher <alexander.deucher(a)amd.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org