Messages in this thread | | | Date | Thu, 22 Sep 2022 06:08:35 +0800 | From | kernel test robot <> | Subject | [jic23-iio:testing 58/58] drivers/iio/adc/mcp3911.c:274:13: warning: variable 'tmp0' set but not used |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing head: d4e1a549566b9ea8b96e80f0cdcbe99714ac256e commit: d4e1a549566b9ea8b96e80f0cdcbe99714ac256e [58/58] iio: adc: mcp3911: add support to set PGA config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20220922/202209220648.Wb6EtPat-lkp@intel.com/config) compiler: loongarch64-linux-gcc (GCC) 12.1.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?id=d4e1a549566b9ea8b96e80f0cdcbe99714ac256e git remote add jic23-iio https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git git fetch --no-tags jic23-iio testing git checkout d4e1a549566b9ea8b96e80f0cdcbe99714ac256e # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash drivers/iio/
If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
drivers/iio/adc/mcp3911.c: In function 'mcp3911_calc_scale_table': >> drivers/iio/adc/mcp3911.c:274:13: warning: variable 'tmp0' set but not used [-Wunused-but-set-variable] 274 | int tmp0, tmp1; | ^~~~
vim +/tmp0 +274 drivers/iio/adc/mcp3911.c
268 269 static int mcp3911_calc_scale_table(struct mcp3911 *adc) 270 { 271 u32 ref = MCP3911_INT_VREF_MV; 272 u32 div; 273 int ret; > 274 int tmp0, tmp1; 275 s64 tmp2; 276 277 if (adc->vref) { 278 ret = regulator_get_voltage(adc->vref); 279 if (ret < 0) { 280 dev_err(&adc->spi->dev, 281 "failed to get vref voltage: %d\n", 282 ret); 283 return ret; 284 } 285 286 ref = ret / 1000; 287 } 288 289 /* 290 * For 24-bit Conversion 291 * Raw = ((Voltage)/(Vref) * 2^23 * Gain * 1.5 292 * Voltage = Raw * (Vref)/(2^23 * Gain * 1.5) 293 * 294 * ref = Reference voltage 295 * div = (2^23 * 1.5 * gain) = 12582912 * gain 296 */ 297 for (int i = 0; i < MCP3911_NUM_SCALES; i++) { 298 div = 12582912 * BIT(i); 299 tmp2 = div_s64((s64)ref * 1000000000LL, div); 300 tmp1 = div; 301 tmp0 = (int)div_s64_rem(tmp2, 1000000000, &tmp1); 302 303 mcp3911_scale_table[i][0] = 0; 304 mcp3911_scale_table[i][1] = tmp1; 305 } 306 307 return 0; 308 } 309
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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