Hi Yongbang, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on drm-misc/drm-misc-next v6.12-rc7 next-20241112] [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/Yongbang-Shi/drm-hisilicon-hibmc-add-dp-aux-in-hibmc/20241113-013224 base: linus/master patch link: https://lore.kernel.org/r/20241112132348.2631150-2-shiyongbang%40huawei.com patch subject: [PATCH v4 drm-dp 1/5] drm/hisilicon/hibmc: add dp aux in hibmc config: x86_64-buildonly-randconfig-003-20241113 (https://download.01.org/0day-ci/archive/20241113/202411131438.RZWYrWTE-lkp@xxxxxxxxx/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241113/202411131438.RZWYrWTE-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/202411131438.RZWYrWTE-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c:9: In file included from drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h:14: In file included from include/drm/display/drm_dp_helper.h:27: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:21: In file included from include/linux/mm.h:2213: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ In file included from drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c:9: >> drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h:31:11: warning: result of comparison of constant 18446744073709551615 with expression of type 'typeof (_Generic((mask), char: (unsigned char)0, unsigned char: (unsigned char)0, signed char: (unsigned char)0, unsigned short: (unsigned short)0, short: (unsigned short)0, unsigned int: (unsigned int)0, int: (unsigned int)0, unsigned long: (unsigned long)0, long: (unsigned long)0, unsigned long long: (unsigned long long)0, long long: (unsigned long long)0, default: (mask)))' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare] 31 | value |= FIELD_PREP(mask, val); | ^~~~~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:115:3: note: expanded from macro 'FIELD_PREP' 115 | __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:72:53: note: expanded from macro '__BF_FIELD_CHECK' 72 | BUILD_BUG_ON_MSG(__bf_cast_unsigned(_mask, _mask) > \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ 73 | __bf_cast_unsigned(_reg, ~0ull), \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 74 | _pfx "type of reg too small for mask"); \ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ include/linux/compiler_types.h:517:22: note: expanded from macro 'compiletime_assert' 517 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:505:23: note: expanded from macro '_compiletime_assert' 505 | __compiletime_assert(condition, msg, prefix, suffix) | ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:497:9: note: expanded from macro '__compiletime_assert' 497 | if (!(condition)) \ | ^~~~~~~~~ 2 warnings generated. vim +31 drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h 22 23 static inline void hibmc_dp_reg_write_field(struct hibmc_dp_dev *dp, u32 offset, u32 mask, u32 val) 24 { 25 u32 value; 26 27 mutex_lock(&dp->lock); 28 29 value = readl(dp->base + offset); 30 value &= ~mask; > 31 value |= FIELD_PREP(mask, val); 32 writel(value, dp->base + offset); 33 34 mutex_unlock(&dp->lock); 35 } 36 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
