tree: https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-clk-gpio-regulator-rtc-5.13 head: 5a8a64d9a38b9d3794f9f5e153fc0358b858cc24 commit: 9cf37cec4b7d2cb972ba1682dd5c8f39a5761129 [10/16] regulator: rohm-regulator: linear voltage support config: i386-randconfig-s001-20210414 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-280-g2cd6d34e-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git/commit/?id=9c... git remote add lee-mfd https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git git fetch --no-tags lee-mfd ib-mfd-clk-gpio-regulator-rtc-5.13 git checkout 9cf37cec4b7d2cb972ba1682dd5c8f39a5761129 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/regulator/rohm-regulator.c: In function 'set_dvs_level': 44 | ret = regulator_desc_list_voltage_linear(desc, i); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | regulator_list_voltage_linear cc1: some warnings being treated as errors vim +44 drivers/regulator/rohm-regulator.c 10 11 static int set_dvs_level(const struct regulator_desc *desc, 12 struct device_node *np, struct regmap *regmap, 13 char *prop, unsigned int reg, unsigned int mask, 14 unsigned int omask, unsigned int oreg) 15 { 16 int ret, i; 17 uint32_t uv; 18 19 ret = of_property_read_u32(np, prop, &uv); 20 if (ret) { 21 if (ret != -EINVAL) 22 return ret; 23 return 0; 24 } 25 /* If voltage is set to 0 => disable */ 26 if (uv == 0) { 27 if (omask) 28 return regmap_update_bits(regmap, oreg, omask, 0); 29 } 30 /* Some setups don't allow setting own voltage but do allow enabling */ 31 if (!mask) { 32 if (omask) 33 return regmap_update_bits(regmap, oreg, omask, omask); 34 35 return -EINVAL; 36 } 37 for (i = 0; i < desc->n_voltages; i++) { 38 /* NOTE to next hacker - Does not support pickable ranges */ 39 if (desc->linear_range_selectors) 40 return -EINVAL; 41 if (desc->n_linear_ranges) 42 ret = regulator_desc_list_voltage_linear_range(desc, i); 43 else 45 if (ret < 0) 46 continue; 47 if (ret == uv) { 48 i <<= ffs(desc->vsel_mask) - 1; 49 ret = regmap_update_bits(regmap, reg, mask, i); 50 if (omask && !ret) 51 ret = regmap_update_bits(regmap, oreg, omask, 52 omask); 53 break; 54 } 55 } 56 return ret; 57 } 58 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org