[kbuild-all] [linux-next:master 10249/10701] drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c:25:6: warning: no previous prototype for 'dpu_setup_dspp_pcc'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: fb57b1fabcb28f358901b2df90abd2b48abc1ca8 commit: 4259ff7ae509ed880b3a7bb685972c3a3bf4b74b [10249/10701] drm/msm/dpu: add support for pcc color block in dpu driver config: arm-randconfig-r013-20200519 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 4259ff7ae509ed880b3a7bb685972c3a3bf4b74b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): 25 | void dpu_setup_dspp_pcc(struct dpu_hw_dspp *ctx, | ^~~~~~~~~~~~~~~~~~ vim +/dpu_setup_dspp_pcc +25 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c 24 26 struct dpu_hw_pcc_cfg *cfg) 27 { 28 29 u32 base = ctx->cap->sblk->pcc.base; 30 31 if (!ctx || !base) { 32 DRM_ERROR("invalid ctx %pK pcc base 0x%x\n", ctx, base); 33 return; 34 } 35 36 if (!cfg) { 37 DRM_DEBUG_DRIVER("disable pcc feature\n"); 38 DPU_REG_WRITE(&ctx->hw, base, PCC_DIS); 39 return; 40 } 41 42 DPU_REG_WRITE(&ctx->hw, base + PCC_RED_R_OFF, cfg->r.r); 43 DPU_REG_WRITE(&ctx->hw, base + PCC_RED_G_OFF, cfg->r.g); 44 DPU_REG_WRITE(&ctx->hw, base + PCC_RED_B_OFF, cfg->r.b); 45 46 DPU_REG_WRITE(&ctx->hw, base + PCC_GREEN_R_OFF, cfg->g.r); 47 DPU_REG_WRITE(&ctx->hw, base + PCC_GREEN_G_OFF, cfg->g.g); 48 DPU_REG_WRITE(&ctx->hw, base + PCC_GREEN_B_OFF, cfg->g.b); 49 50 DPU_REG_WRITE(&ctx->hw, base + PCC_BLUE_R_OFF, cfg->b.r); 51 DPU_REG_WRITE(&ctx->hw, base + PCC_BLUE_G_OFF, cfg->b.g); 52 DPU_REG_WRITE(&ctx->hw, base + PCC_BLUE_B_OFF, cfg->b.b); 53 54 DPU_REG_WRITE(&ctx->hw, base, PCC_EN); 55 } 56 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org