tree:   https://github.com/0day-ci/linux/commits/min-li-xe-renesas-com/ptp-clockmatrix-use-rsmu-driver-to-access-i2c-spi-bus/20210922-152050
head:   cffaee07726f4bfb624fff0f4a35e0102026bf6f
commit: cffaee07726f4bfb624fff0f4a35e0102026bf6f ptp: clockmatrix: use rsmu driver to access i2c/spi bus
date:   7 weeks ago
config: i386-randconfig-a011-20210928 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/cffaee07726f4bfb624fff0f4a35e0102026bf6f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review min-li-xe-renesas-com/ptp-clockmatrix-use-rsmu-driver-to-access-i2c-spi-bus/20210922-152050
        git checkout cffaee07726f4bfb624fff0f4a35e0102026bf6f
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ld: drivers/ptp/ptp_clockmatrix.o: in function `idtcm_get_dco_delay':
>> drivers/ptp/ptp_clockmatrix.c:2179: undefined reference to `__udivdi3'
>> ld: drivers/ptp/ptp_clockmatrix.c:2182: undefined reference to `__udivdi3'


vim +2179 drivers/ptp/ptp_clockmatrix.c

  2148	
  2149	/*
  2150	 * Compensate for the PTP DCO input-to-output delay.
  2151	 * This delay is 18 FOD cycles.
  2152	 */
  2153	static u32 idtcm_get_dco_delay(struct idtcm_channel *channel)
  2154	{
  2155		struct idtcm *idtcm = channel->idtcm;
  2156		u8 mbuf[8] = {0};
  2157		u8 nbuf[2] = {0};
  2158		u32 fodFreq;
  2159		int err;
  2160		u64 m;
  2161		u16 n;
  2162	
  2163		err = idtcm_read(idtcm, channel->dpll_ctrl_n,
  2164				 DPLL_CTRL_DPLL_FOD_FREQ, mbuf, 6);
  2165		if (err)
  2166			return 0;
  2167	
  2168		err = idtcm_read(idtcm, channel->dpll_ctrl_n,
  2169				 DPLL_CTRL_DPLL_FOD_FREQ + 6, nbuf, 2);
  2170		if (err)
  2171			return 0;
  2172	
  2173		m = get_unaligned_le64(mbuf);
  2174		n = get_unaligned_le16(nbuf);
  2175	
  2176		if (n == 0)
  2177			n = 1;
  2178	
> 2179		fodFreq = m / n;
  2180	
  2181		if (fodFreq >= 500000000)
> 2182			return 18 * (u64)NSEC_PER_SEC / fodFreq;
  2183	
  2184		return 0;
  2185	}
  2186	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org