Hi Wayne, kernel test robot noticed the following build warnings: [auto build test WARNING on drm/drm-next] [also build test WARNING on drm-exynos/exynos-drm-next linus/master v6.13-rc6 next-20250110] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Wayne-Lin/drm-dp_mst-Fix-drm-RAD-print/20250110-103837 base: git://anongit.freedesktop.org/drm/drm drm-next patch link: https://lore.kernel.org/r/20250110023618.66401-3-Wayne.Lin%40amd.com patch subject: [Patch v3 2/2] drm/dp_mst: Add helper to get port number at specific LCT from RAD config: x86_64-randconfig-121-20250111 (https://download.01.org/0day-ci/archive/20250111/202501111927.qHX3ZcBP-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250111/202501111927.qHX3ZcBP-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202501111927.qHX3ZcBP-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/display/drm_dp_mst_topology.c:201:81: sparse: sparse: incorrect type in argument 2 (different modifiers) @@ expected unsigned char [usertype] *rad @@ got unsigned char const [usertype] *rad @@ drivers/gpu/drm/display/drm_dp_mst_topology.c:201:81: sparse: expected unsigned char [usertype] *rad drivers/gpu/drm/display/drm_dp_mst_topology.c:201:81: sparse: got unsigned char const [usertype] *rad drivers/gpu/drm/display/drm_dp_mst_topology.c: note: in included file (through include/linux/smp.h, include/linux/lockdep.h, include/linux/spinlock.h, ...): include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true vim +201 drivers/gpu/drm/display/drm_dp_mst_topology.c 193 194 static int 195 drm_dp_mst_rad_to_str(const u8 rad[8], u8 lct, char *out, size_t len) 196 { 197 int i; 198 u8 unpacked_rad[16] = {}; 199 200 for (i = 0; i < lct; i++) > 201 unpacked_rad[i] = drm_dp_mst_get_ufp_num_at_lct_from_rad(i + 1, rad); 202 203 /* TODO: Eventually add something to printk so we can format the rad 204 * like this: 1.2.3 205 */ 206 return snprintf(out, len, "%*phC", lct, unpacked_rad); 207 } 208 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
