[kbuild-all] [zen-kernel-zen-kernel:5.11/bbr2 14/30] net/ipv4/tcp_bbr.c:313: undefined reference to `__udivdi3'

tree: https://github.com/zen-kernel/zen-kernel 5.11/bbr2 head: 5ded94b0a37ea404ce97aa284b7c8dbfcc39d788 commit: 35d326afdf4fb797b252bc2d01407df0f1f05cdc [14/30] net-tcp: re-generalize TSO sizing in TCP CC module API config: i386-randconfig-r023-20210218 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/zen-kernel/zen-kernel/commit/35d326afdf4fb797b252bc2d0... git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel git fetch --no-tags zen-kernel-zen-kernel 5.11/bbr2 git checkout 35d326afdf4fb797b252bc2d01407df0f1f05cdc # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: net/ipv4/tcp_bbr.o: in function `bbr_tso_segs_generic': vim +313 net/ipv4/tcp_bbr.c 299 300 /* Return the number of segments BBR would like in a TSO/GSO skb, given 301 * a particular max gso size as a constraint. 302 */ 303 static u32 bbr_tso_segs_generic(struct sock *sk, unsigned int mss_now, 304 u32 gso_max_size) 305 { 306 u32 segs; 307 u64 bytes; 308 309 /* Budget a TSO/GSO burst size allowance based on bw (pacing_rate). */ 310 bytes = sk->sk_pacing_rate >> sk->sk_pacing_shift; 311 312 bytes = min_t(u32, bytes, gso_max_size - 1 - MAX_TCP_HEADER); 314 return segs; 315 } 316 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org