tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 18ecd30af1a8402c162cca1bd58771c0e5be7815 commit: be4a11cf98aff5d456eae947a49b6163393d9420 [12283/13468] rtc: rzn1: Add oscillator offset support config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220522/202205221120.Tt6UxePI-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 1443dbaba6f0e57be066995db9164f89fb57b413) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=be4a11cf98aff5d456eae947a49b6163393d9420 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout be4a11cf98aff5d456eae947a49b6163393d9420 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/rtc/ net/sched/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/rtc/rtc-rzn1.c:291:3: warning: variable 'val' is uninitialized when used here [-Wuninitialized] val |= RZN1_RTC_SUBU_DEV; ^~~ drivers/rtc/rtc-rzn1.c:275:9: note: initialize the variable 'val' to silence this warning u32 val; ^ = 0 1 warning generated. vim +/val +291 drivers/rtc/rtc-rzn1.c 269 270 static int rzn1_rtc_set_offset(struct device *dev, long offset) 271 { 272 struct rzn1_rtc *rtc = dev_get_drvdata(dev); 273 unsigned int steps; 274 int stepsh, stepsl; 275 u32 val; 276 int ret; 277 278 /* 279 * Check which resolution mode (every 20 or 60s) can be used. 280 * Between 2 and 124 clock pulses can be added or substracted. 281 * 282 * In 20s mode, the minimum resolution is 2 / (32768 * 20) which is 283 * close to 3051 ppb. In 60s mode, the resolution is closer to 1017. 284 */ 285 stepsh = DIV_ROUND_CLOSEST(offset, 1017); 286 stepsl = DIV_ROUND_CLOSEST(offset, 3051); 287 288 if (stepsh >= -0x3E && stepsh <= 0x3E) { 289 /* 1017 ppb per step */ 290 steps = stepsh; > 291 val |= RZN1_RTC_SUBU_DEV; 292 } else if (stepsl >= -0x3E && stepsl <= 0x3E) { 293 /* 3051 ppb per step */ 294 steps = stepsl; 295 } else { 296 return -ERANGE; 297 } 298 299 if (!steps) 300 return 0; 301 302 if (steps > 0) { 303 val |= steps + 1; 304 } else { 305 val |= RZN1_RTC_SUBU_DECR; 306 val |= (~(-steps - 1)) & 0x3F; 307 } 308 309 ret = readl_poll_timeout(rtc->base + RZN1_RTC_CTL2, val, 310 !(val & RZN1_RTC_CTL2_WUST), 100, 2000000); 311 if (ret) 312 return ret; 313 314 writel(val, rtc->base + RZN1_RTC_SUBU); 315 316 return 0; 317 } 318 -- 0-DAY CI Kernel Test Service https://01.org/lkp
