tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-5.4.y head: ca222ae72ea37d74141ed53deaa0a07263ef34e8 commit: 93fac9fa368d4c49b62745b6f324d019fb42ecc4 [9521/13425] HACK: scripts: headers_install: fix allmodconfig builds config: sparc-randconfig-s032-20210323 (attached as .config) compiler: sparc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-277-gc089cd2d-dirty git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-linux-5.4.y git checkout 93fac9fa368d4c49b62745b6f324d019fb42ecc4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc 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 >>): In file included from include/linux/tcp.h:19, from include/linux/ipv6.h:87, from include/net/ipv6.h:12, from include/linux/sunrpc/clnt.h:28, from include/linux/nfs_fs.h:32, from init/do_mounts.c:23: include/net/sock.h: In function 'sock_recv_redundant_info': 2461 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2461:29: note: each undeclared identifier is reported only once for each function it appears in -- In file included from include/linux/tcp.h:19, from include/linux/ipv6.h:87, from include/net/addrconf.h:52, from lib/vsprintf.c:38: include/net/sock.h: In function 'sock_recv_redundant_info': 2461 | put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); | ^~~~~~~~~~~~~ include/net/sock.h:2461:29: note: each undeclared identifier is reported only once for each function it appears in lib/vsprintf.c: In function 'va_format': lib/vsprintf.c:1620:2: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 1620 | buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va); | ^~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for COMPAT_BINFMT_ELF Depends on COMPAT && BINFMT_ELF Selected by - COMPAT && SPARC64 vim +/SCM_REDUNDANT +2461 include/net/sock.h 8f932f762e7928 Willem de Bruijn 2018-12-17 2453 e804afb5449b93 WingMan Kwok 2019-05-07 2454 static inline void sock_recv_redundant_info(struct msghdr *msg, struct sock *sk, e804afb5449b93 WingMan Kwok 2019-05-07 2455 struct sk_buff *skb) e804afb5449b93 WingMan Kwok 2019-05-07 2456 { e804afb5449b93 WingMan Kwok 2019-05-07 2457 struct skb_redundant_info *sred; e804afb5449b93 WingMan Kwok 2019-05-07 2458 e804afb5449b93 WingMan Kwok 2019-05-07 2459 sred = skb_redinfo(skb); e804afb5449b93 WingMan Kwok 2019-05-07 2460 if (sred->lsdu_size) e804afb5449b93 WingMan Kwok 2019-05-07 @2461 put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); 70e28ef2c9afeb WingMan Kwok 2018-03-02 2462 70e28ef2c9afeb WingMan Kwok 2018-03-02 2463 __sock_recv_redinfo_timestamp(msg, sk, skb); 70e28ef2c9afeb WingMan Kwok 2018-03-02 2464 :::::: The code at line 2461 was first introduced by commit :::::: e804afb5449b93d5b543a1685b0b2fab328873fc net: packet: pass on redundant net info in packet_recvmsg :::::: TO: WingMan Kwok <w-kwok2(a)ti.com&gt; :::::: CC: Lokesh Vutla <lokeshvutla(a)ti.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org