Hi Jitao, [auto build test WARNING on v4.4-rc8] [also build test WARNING on next-20160113] [cannot apply to drm/drm-next] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Jitao-Shi/Documentation-bridge-Add-documentation-for-ps8640-DT-properties/20160113-102004 config: i386-randconfig-sb0-01140840 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/gpu/drm/bridge/parade-ps8640.c: In function 'ps8640_update_fw_store': >> drivers/gpu/drm/bridge/parade-ps8640.c:788:20: warning: 'progress_cnt' may be used uninitialized in this function [-Wmaybe-uninitialized] if (progress_cnt != (pos * 100) / fw->size) { ^ drivers/gpu/drm/bridge/parade-ps8640.c:770:5: note: 'progress_cnt' was declared here u8 progress_cnt, rom_page_id[2]; ^ vim +/progress_cnt +788 drivers/gpu/drm/bridge/parade-ps8640.c 772 773 ps8640_regw_byte(client2, PAGE2_SPI_CFG3, I2C_TO_SPI_RESET); 774 msleep(100); 775 ps8640_regw_byte(client2, PAGE2_SPI_CFG3, 0x00); 776 777 while (pos < fw->size) { 778 rom_page_id[0] = (pos >> 8) & 0xFF; 779 rom_page_id[1] = (pos >> 16) & 0xFF; 780 ret = ps8640_regw(client2, PAGE2_ROMADD_BYTE1, rom_page_id, 2); 781 if (ret) 782 goto error; 783 ret = ps8640_regw(client7, 0, fw->data + pos, 256); 784 if (ret) 785 goto error; 786 787 pos += 256; > 788 if (progress_cnt != (pos * 100) / fw->size) { 789 progress_cnt = (pos * 100) / fw->size; 790 dev_info(dev, "fw update progress percent %d\n", 791 progress_cnt); 792 } 793 } 794 return 0; 795 796 error: --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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