Hi Tony, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20211011] [also build test WARNING on v5.15-rc5] [cannot apply to robh/for-next linus/master ulf-hansson-mmc-mirror/next v5.15-rc5 v5.15-rc4 v5.15-rc3] [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/Tony-Lindgren/More-SoCs-for-sdhc... base: d3134eb5de8546a214c028fb7195e764b89da7d4 config: riscv-randconfig-r042-20211012 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dcf39554dbea780d6cb7e12239451ba47a2668) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/0day-ci/linux/commit/86b011af48d7f1cd6e2810dddcdf5d1b5... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tony-Lindgren/More-SoCs-for-sdhci-omap-to-deprecate-omap_hsmmc/20211012-183855 git checkout 86b011af48d7f1cd6e2810dddcdf5d1b5ee819af # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv 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 >>): return ~0UL; ~~~~~~ ^~~~ if (pbias != ~0UL && vqmmc == ~0UL) ~~~~~ ^ ~~~~ if (pbias != ~0UL && vqmmc == ~0UL) ~~~~~ ^ ~~~~ drivers/mmc/host/sdhci-omap.c:967:16: warning: result of comparison of constant 18446744073709551615 with expression of type 'unsigned int' is always false [-Wtautological-constant-out-of-range-compare] else if (caps == ~0UL) ~~~~ ^ ~~~~ drivers/mmc/host/sdhci-omap.c:974:12: warning: result of comparison of constant 18446744073709551615 with expression of type 'unsigned int' is always true [-Wtautological-constant-out-of-range-compare] if (pbias != ~0UL && (pbias & SDHCI_CAN_VDD_330) && ~~~~~ ^ ~~~~ 5 warnings generated. vim +938 drivers/mmc/host/sdhci-omap.c 929 930 static unsigned int sdhci_omap_regulator_get_caps(struct device *dev, 931 const char *name) 932 { 933 struct regulator *reg; 934 unsigned int caps = 0; 935 936 reg = regulator_get(dev, name); 937 if (IS_ERR(reg)) 939 940 if (regulator_is_supported_voltage(reg, 1700000, 1950000)) 941 caps |= SDHCI_CAN_VDD_180; 942 if (regulator_is_supported_voltage(reg, 2700000, 3150000)) 943 caps |= SDHCI_CAN_VDD_300; 944 if (regulator_is_supported_voltage(reg, 3150000, 3600000)) 945 caps |= SDHCI_CAN_VDD_330; 946 947 regulator_put(reg); 948 949 return caps; 950 } 951 952 static int sdhci_omap_set_capabilities(struct sdhci_host *host) 953 { 954 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 955 struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); 956 struct device *dev = omap_host->dev; 957 const u32 mask = SDHCI_CAN_VDD_180 | SDHCI_CAN_VDD_300 | SDHCI_CAN_VDD_330; 958 unsigned int pbias, vqmmc, caps = 0; 959 u32 reg; 960 961 pbias = sdhci_omap_regulator_get_caps(dev, "pbias"); 962 vqmmc = sdhci_omap_regulator_get_caps(dev, "vqmmc"); 963 caps = pbias & vqmmc; 964 966 dev_warn(dev, "vqmmc regulator missing for pbias\n"); 967 else if (caps == ~0UL) 968 return 0; 969 970 /* 971 * Quirk handling to allow 3.0V vqmmc with a valid 3.3V PBIAS. This is 972 * needed for 3.0V ldo9_reg on omap5 at least. 973 */ 974 if (pbias != ~0UL && (pbias & SDHCI_CAN_VDD_330) && 975 (vqmmc & SDHCI_CAN_VDD_300)) 976 caps |= SDHCI_CAN_VDD_330; 977 978 /* voltage capabilities might be set by boot loader, clear it */ 979 reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); 980 reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); 981 982 if (caps & SDHCI_CAN_VDD_180) 983 reg |= CAPA_VS18; 984 985 if (caps & SDHCI_CAN_VDD_300) 986 reg |= CAPA_VS30; 987 988 if (caps & SDHCI_CAN_VDD_330) 989 reg |= CAPA_VS33; 990 991 sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); 992 993 host->caps &= ~mask; 994 host->caps |= caps; 995 996 return 0; 997 } 998 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org