From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0000820FC for ; Tue, 31 May 2022 08:28:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1653985685; x=1685521685; h=date:from:to:cc:subject:message-id:mime-version; bh=kjwrMBLQQvTuWrLoai5fV9yw67Aj4PIvRurr/CvTRsE=; b=L2+D8l6jFk7zisb4kV12z7aQD9pBtIAiYABBTf5AGkLJnQM5g5uqmFoF a1gcWD+nqPwdVLAl1xR+cyqGBT16giAnI9euUYEWNXdkE3brEwexQSx9K bHkfu1425CCZepDTXHXoRwWkD4hZDok9yfupJPjnFPOFxfJRBk7QQAPpK vb1qRDNHHKebbZIkckzJUEqzaM8cQWuLnFVMAm8wE14TP1rIk+YycoxPq +nrkij95XQq1RrW0y4YkpuzhCyfIQwWFNYYwbhpgz40j2/wfVTFV0IsVb 5w66DvAKzvuI/GL0pTNQpXyZMR6lhstAzHoKDlIIm5OWEUt9TAf88VbLR w==; X-IronPort-AV: E=McAfee;i="6400,9594,10363"; a="338226741" X-IronPort-AV: E=Sophos;i="5.91,264,1647327600"; d="scan'208";a="338226741" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 May 2022 01:28:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,264,1647327600"; d="scan'208";a="529481454" Received: from lkp-server01.sh.intel.com (HELO 60dabacc1df6) ([10.239.97.150]) by orsmga003.jf.intel.com with ESMTP; 31 May 2022 01:28:03 -0700 Received: from kbuild by 60dabacc1df6 with local (Exim 4.95) (envelope-from ) id 1nvxER-0002WA-0p; Tue, 31 May 2022 08:28:03 +0000 Date: Tue, 31 May 2022 16:27:37 +0800 From: kernel test robot To: Venkateshwar Rao G Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-arm-kernel@lists.infradead.org, Michal Simek , Hyun Kwon Subject: [xilinx-xlnx:xlnx_rebase_v5.15_LTS_2022.1_update 643/1102] drivers/gpu/drm/xlnx/xlnx_scaler.c:866:3: warning: variable 'nr_rds' is uninitialized when used here Message-ID: <202205311651.RnyRtXxM-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi Venkateshwar, FYI, the error/warning still remains. tree: https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.15_LTS_2022.1_update head: 8e42834c82e505bacccca3c9d35da7041793d9d7 commit: 3a0ea0feebe5cb529d57e0f9673d22e4754c6415 [643/1102] drm: xlnx: scaler: Adding vpss-scaler driver config: arm-randconfig-r026-20220531 (https://download.01.org/0day-ci/archive/20220531/202205311651.RnyRtXxM-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c825abd6b0198fb088d9752f556a70705bc99dfd) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/Xilinx/linux-xlnx/commit/3a0ea0feebe5cb529d57e0f9673d22e4754c6415 git remote add xilinx-xlnx https://github.com/Xilinx/linux-xlnx git fetch --no-tags xilinx-xlnx xlnx_rebase_v5.15_LTS_2022.1_update git checkout 3a0ea0feebe5cb529d57e0f9673d22e4754c6415 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/gpu/drm/xlnx/ drivers/media/i2c/ drivers/staging/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/gpu/drm/xlnx/xlnx_scaler.c:866:3: warning: variable 'nr_rds' is uninitialized when used here [-Wuninitialized] nr_rds += nr_rds_clck; ^~~~~~ drivers/gpu/drm/xlnx/xlnx_scaler.c:821:12: note: initialize the variable 'nr_rds' to silence this warning int nr_rds; ^ = 0 drivers/gpu/drm/xlnx/xlnx_scaler.c:1394:14: warning: variable 'fmt_out' set but not used [-Wunused-but-set-variable] u32 fmt_in, fmt_out; ^ drivers/gpu/drm/xlnx/xlnx_scaler.c:1394:6: warning: variable 'fmt_in' set but not used [-Wunused-but-set-variable] u32 fmt_in, fmt_out; ^ 3 warnings generated. vim +/nr_rds +866 drivers/gpu/drm/xlnx/xlnx_scaler.c 800 801 /** 802 * xv_hscaler_calculate_phases - Calculates h-scaler phases 803 * @scaler: Pointer to scaler registers base 804 * @width_in: input width 805 * @width_out: output width 806 * @pixel_rate: pixel rate 807 * 808 */ 809 static void 810 xv_hscaler_calculate_phases(struct xilinx_scaler *scaler, 811 u32 width_in, u32 width_out, u32 pixel_rate) 812 { 813 unsigned int loop_width; 814 unsigned int x, s; 815 int offset = 0; 816 int xwrite_pos = 0; 817 bool output_write_en; 818 bool get_new_pix; 819 u64 phaseH; 820 u32 array_idx = 0; 821 int nr_rds; 822 int nr_rds_clck; 823 unsigned int nphases = scaler->max_num_phases; 824 unsigned int nppc = scaler->pix_per_clk; 825 unsigned int shift = XHSC_STEP_PRECISION_SHIFT - ilog2(nphases); 826 827 loop_width = max_t(u32, width_in, width_out); 828 loop_width = ALIGN(loop_width + nppc - 1, nppc); 829 830 for (x = 0; x < loop_width; x++) { 831 nr_rds_clck = 0; 832 for (s = 0; s < nppc; s++) { 833 phaseH = (offset >> shift) & (nphases - 1); 834 get_new_pix = false; 835 output_write_en = false; 836 if ((offset >> XHSC_STEP_PRECISION_SHIFT) != 0) { 837 get_new_pix = true; 838 offset -= (1 << XHSC_STEP_PRECISION_SHIFT); 839 array_idx++; 840 } 841 842 if (((offset >> XHSC_STEP_PRECISION_SHIFT) == 0) && 843 xwrite_pos < width_out) { 844 offset += pixel_rate; 845 output_write_en = true; 846 xwrite_pos++; 847 } 848 849 scaler->H_phases[x] |= (phaseH << 850 (s * XHSC_HPHASE_MULTIPLIER)); 851 scaler->H_phases[x] |= (array_idx << 852 (XHSC_HPHASE_SHIFT_BY_6 + 853 (s * XHSC_HPHASE_MULTIPLIER))); 854 if (output_write_en) { 855 scaler->H_phases[x] |= 856 (XV_HSCALER_PHASESH_V_OUTPUT_WR_EN << 857 (s * XHSC_HPHASE_MULTIPLIER)); 858 } 859 860 if (get_new_pix) 861 nr_rds_clck++; 862 } 863 if (array_idx >= nppc) 864 array_idx &= (nppc - 1); 865 > 866 nr_rds += nr_rds_clck; 867 if (nr_rds >= nppc) 868 nr_rds -= nppc; 869 } 870 } 871 -- 0-DAY CI Kernel Test Service https://01.org/lkp