netdev - [net-next:master 7/66] net/core/pktgen.c:2368: undefined reference to `_

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Date:   Sat, 25 Jan 2020 21:00:06 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Niu Xilei <niu_xilei@....com>
Cc:     kbuild-all@...ts.01.org, netdev@...r.kernel.org
Subject: [net-next:master 7/66] net/core/pktgen.c:2368: undefined reference
 to `__umoddi3'

Hi Niu,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head:   6ec8b6cd79a4360e375da99d848d63f8d4fb08b3
commit: 7786a1af2a6bceb07860ec720e74714004438834 [7/66] pktgen: Allow configuration of IPv6 source address range
config: i386-randconfig-c003-20200125 (attached as .config)
compiler: gcc-7 (Debian 7.5.0-3) 7.5.0
reproduce:
        git checkout 7786a1af2a6bceb07860ec720e74714004438834
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   ld: net/core/pktgen.o: in function `set_src_in6_addr':
>> net/core/pktgen.c:2368: undefined reference to `__umoddi3'

vim +2368 net/core/pktgen.c

  2345	
  2346	/* generate ipv6 source addr */
  2347	static void set_src_in6_addr(struct pktgen_dev *pkt_dev)
  2348	{
  2349		u64 min6, max6, rand, i;
  2350		struct in6_addr addr6;
  2351		__be64 addr_l, *t;
  2352	
  2353		min6 = pkt_dev->min_in6_l;
  2354		max6 = pkt_dev->max_in6_l;
  2355	
  2356		/* only generate source address in least significant 64 bits range
  2357		 * most significant 64 bits must be equal
  2358		 */
  2359		if (pkt_dev->max_in6_h != pkt_dev->min_in6_h || min6 >= max6)
  2360			return;
  2361	
  2362		addr6 = pkt_dev->min_in6_saddr;
  2363		t = (__be64 *)addr6.s6_addr + 1;
  2364	
  2365		if (pkt_dev->flags & F_IPSRC_RND) {
  2366			do {
  2367				prandom_bytes(&rand, sizeof(rand));
> 2368				rand = rand % (max6 - min6) + min6;
  2369				addr_l = cpu_to_be64(rand);
  2370				memcpy(t, &addr_l, 8);
  2371			} while (ipv6_addr_loopback(&addr6) ||
  2372				 ipv6_addr_v4mapped(&addr6) ||
  2373				 ipv6_addr_is_multicast(&addr6));
  2374		} else {
  2375			addr6 = pkt_dev->cur_in6_saddr;
  2376			i = be64_to_cpu(*t);
  2377			if (++i > max6)
  2378				i = min6;
  2379			addr_l = cpu_to_be64(i);
  2380			memcpy(t, &addr_l, 8);
  2381		}
  2382		pkt_dev->cur_in6_saddr = addr6;
  2383	}
  2384	

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation

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