Hi Taniya, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on clk/clk-next] [also build test WARNING on v5.12-rc2 next-20210310] [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/Taniya-Das/clk-qcom-clk-rcg2-Add... base: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next config: powerpc64-randconfig-r035-20210310 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project cd9a69289c7825d54450cb6829fef2c8e0f1963a) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://github.com/0day-ci/linux/commit/affeb4ce842dbf391537c4e7279ff85e0... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Taniya-Das/clk-qcom-clk-rcg2-Add-support-for-duty-cycle-for-RCG/20210311-024657 git checkout affeb4ce842dbf391537c4e7279ff85e050e1e47 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): d_val = DIV_ROUND_CLOSEST(n_val * duty_per * 2, 100); ^~~~~~~~ include/linux/math.h:87:18: note: expanded from macro 'DIV_ROUND_CLOSEST' typeof(x) __x = x; \ ^ drivers/clk/qcom/clk-rcg2.c:363:64: note: initialize the variable 'duty_per' to silence this warning u32 notn_m_val, n_val, m_val, d_val, not2d_val, mask, duty_per; ^ = 0 1 warning generated. vim +/duty_per +377 drivers/clk/qcom/clk-rcg2.c 359 360 static int clk_rcg2_set_duty_cycle(struct clk_hw *hw, struct clk_duty *duty) 361 { 362 struct clk_rcg2 *rcg = to_clk_rcg2(hw); 363 u32 notn_m_val, n_val, m_val, d_val, not2d_val, mask, duty_per; 364 int ret; 365 366 if (!rcg->mnd_width) 367 return 0; 368 369 mask = BIT(rcg->mnd_width) - 1; 370 371 regmap_read(rcg->clkr.regmap, RCG_N_OFFSET(rcg), &notn_m_val); 372 regmap_read(rcg->clkr.regmap, RCG_M_OFFSET(rcg), &m_val); 373 374 n_val = (~(notn_m_val) + m_val) & mask; 375 376 /* Calculate 2d value */ 378 379 /* Check BIT WIDTHS OF 2d. If D is too big reduce Duty cycle. */ 380 if (d_val > mask) 381 d_val = mask; 382 383 if ((d_val / 2) > (n_val - m_val)) 384 d_val = (n_val - m_val) * 2; 385 else if ((d_val / 2) < (m_val / 2)) 386 d_val = m_val; 387 388 not2d_val = ~d_val & mask; 389 390 ret = regmap_update_bits(rcg->clkr.regmap, RCG_D_OFFSET(rcg), mask, 391 not2d_val); 392 if (ret) 393 return ret; 394 395 return update_config(rcg); 396 } 397 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org