[linux-next:master 4284/4834] drivers/ntb/test/ntb_perf.c:1067: undefined reference to `__umoddi3'

[kernel test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   34d1d36073ea4d4c532e8c8345627a9702be799e
commit: dc150dfb081fcd17f8ecfa07d94813e4c445d808 [4284/4834] ntb_perf: extend with burst latency measurement
config: microblaze-randconfig-r024-20220619 (https://download.01.org/0day-ci/archive/20220621/202206212357.xM9BKiVi-lkp@xxxxxxxxx/config)
compiler: microblaze-linux-gcc (GCC) 11.3.0
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/next/linux-next.git/commit/?id=dc150dfb081fcd17f8ecfa07d94813e4c445d808
        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 dc150dfb081fcd17f8ecfa07d94813e4c445d808
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   microblaze-linux-ld: drivers/ntb/test/ntb_perf.o: in function `perf_thread_work':
>> drivers/ntb/test/ntb_perf.c:1067: undefined reference to `__umoddi3'


vim +1067 drivers/ntb/test/ntb_perf.c

  1035	
  1036	static int perf_run_latency(struct perf_thread *pthr)
  1037	{
  1038		struct perf_peer *peer = pthr->perf->test_peer;
  1039		struct ntb_dev *ntb = pthr->perf->ntb;
  1040		void __iomem *flt_dst, *bnd_dst;
  1041		void *flt_src;
  1042		u64 stop_at;
  1043		int ret;
  1044	
  1045		pthr->tries = 0;
  1046		pthr->latency = ktime_get();
  1047		flt_src = pthr->src;
  1048		flt_dst = peer->outbuf;
  1049		bnd_dst = peer->outbuf + peer->outbuf_size;
  1050	
  1051		stop_at = ktime_get_real_fast_ns() + lat_time_ms * NSEC_PER_MSEC;
  1052		while (ktime_get_real_fast_ns() < stop_at) {
  1053			ret = perf_copy_chunk(pthr, flt_dst, flt_src, 1, false);
  1054			if (ret) {
  1055				dev_err(&ntb->dev, "%d: Latency testing error %d\n",
  1056					pthr->tidx, ret);
  1057				pthr->latency = ktime_set(0, 0);
  1058				return ret;
  1059			}
  1060	
  1061			pthr->tries++;
  1062			flt_dst++;
  1063			flt_src++;
  1064	
  1065			if (flt_dst >= bnd_dst || flt_dst < peer->outbuf) {
  1066				flt_dst = peer->outbuf;
> 1067				flt_src = pthr->src;
  1068			}
  1069	
  1070			/* Avoid processor soft lock-ups */
  1071			if (!(pthr->tries % RESCHEDULE_RATIO))
  1072				schedule();
  1073		}
  1074	
  1075		/* Stop timer */
  1076		pthr->latency = ktime_sub(ktime_get(), pthr->latency);
  1077	
  1078		if (pthr->tries < LAT_MIN_TRIES) {
  1079			dev_err(&ntb->dev,
  1080				"%d: Too few steps (%llu) to measure Latency, recommended > %d. Increase value of 'lat_time_ms' parameter\n",
  1081				pthr->tidx, pthr->tries, LAT_MIN_TRIES);
  1082			pthr->latency = ktime_set(0, 0);
  1083			return -EINVAL;
  1084		}
  1085	
  1086		dev_dbg(&ntb->dev, "%d: made %llu tries, lasted %llu usecs\n",
  1087			pthr->tidx, pthr->tries, ktime_to_us(pthr->latency));
  1088	
  1089		pthr->latency = ns_to_ktime(ktime_divns(pthr->latency, pthr->tries));
  1090	
  1091		dev_dbg(&ntb->dev, "%d: latency %llu us (%llu ns)\n", pthr->tidx,
  1092			ktime_to_us(pthr->latency), ktime_to_ns(pthr->latency));
  1093	
  1094		return 0;
  1095	}
  1096	

-- 
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