Hi Dmitry, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.12-rc4 next-20210324] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Dmitry-Baryshkov/drm-msm-dpu-cle... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7acac4b3196caee5e21fb5ea53f8bc124e6a16fc config: arm64-randconfig-r036-20210324 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a4fb88669cd98db6fef7dcac88e3ec425d40c00d) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/8f82b58643355f9e0d03c022b66e276c2... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dmitry-Baryshkov/drm-msm-dpu-cleanup-callbacks-resource-manager/20210324-230347 git checkout 8f82b58643355f9e0d03c022b66e276c252e633a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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 >>): int dpu_hw_intr_disable_irq_nolock(struct dpu_hw_intr *intr, int irq_idx) ^ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c:889:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int dpu_hw_intr_disable_irq_nolock(struct dpu_hw_intr *intr, int irq_idx) ^ static 1 warning generated. vim +/dpu_hw_intr_disable_irq_nolock +889 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c 888 890 { 891 int reg_idx; 892 const struct dpu_intr_reg *reg; 893 const struct dpu_irq_type *irq; 894 const char *dbgstr = NULL; 895 uint32_t cache_irq_mask; 896 897 if (!intr) 898 return -EINVAL; 899 900 if (irq_idx < 0 || irq_idx >= ARRAY_SIZE(dpu_irq_map)) { 901 pr_err("invalid IRQ index: [%d]\n", irq_idx); 902 return -EINVAL; 903 } 904 905 irq = &dpu_irq_map[irq_idx]; 906 reg_idx = irq->reg_idx; 907 reg = &dpu_intr_set[reg_idx]; 908 909 cache_irq_mask = intr->cache_irq_mask[reg_idx]; 910 if ((cache_irq_mask & irq->irq_mask) == 0) { 911 dbgstr = "DPU IRQ is already cleared:"; 912 } else { 913 dbgstr = "DPU IRQ mask disable:"; 914 915 cache_irq_mask &= ~irq->irq_mask; 916 /* Disable interrupts based on the new mask */ 917 DPU_REG_WRITE(&intr->hw, reg->en_off, cache_irq_mask); 918 /* Cleaning any pending interrupt */ 919 DPU_REG_WRITE(&intr->hw, reg->clr_off, irq->irq_mask); 920 921 /* ensure register write goes through */ 922 wmb(); 923 924 intr->cache_irq_mask[reg_idx] = cache_irq_mask; 925 } 926 927 pr_debug("%s MASK:0x%.8x, CACHE-MASK:0x%.8x\n", dbgstr, 928 irq->irq_mask, cache_irq_mask); 929 930 return 0; 931 } 932 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org