[kbuild-all] Re: [mptcp:export 1167/1239] drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:438:10: error: implicit declaration of function 'rmnet_map_ipv6_dl_csum_trailer'

tree: https://github.com/multipath-tcp/mptcp_net-next.git export head: 5b5cad2a38b3527807ad9a9de3dbaeccfa7b7806 commit: 75db5b07f8c393c216fd20f7adc9a167fc684c23 [1167/1239] net: qualcomm: rmnet: eliminate some ifdefs config: powerpc-randconfig-r035-20210612 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d2012d965d60c3258b3a69d024491698f8aec386) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://github.com/multipath-tcp/mptcp_net-next/commit/75db5b07f8c393c216... git remote add mptcp https://github.com/multipath-tcp/mptcp_net-next.git git fetch --no-tags mptcp export git checkout 75db5b07f8c393c216fd20f7adc9a167fc684c23 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 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 >>): __do_insb ^ arch/powerpc/include/asm/io.h:556:56: note: expanded from macro '__do_insb' #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:7: In file included from include/linux/netdevice.h:37: In file included from include/net/net_namespace.h:38: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:85:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:557:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:7: In file included from include/linux/netdevice.h:37: In file included from include/net/net_namespace.h:38: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:87:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:558:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:7: In file included from include/linux/netdevice.h:37: In file included from include/net/net_namespace.h:38: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:89:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:559:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:7: In file included from include/linux/netdevice.h:37: In file included from include/net/net_namespace.h:38: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:91:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:560:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:7: In file included from include/linux/netdevice.h:37: In file included from include/net/net_namespace.h:38: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:93:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:438:10: error: implicit declaration of function 'rmnet_map_ipv6_dl_csum_trailer' [-Werror,-Wimplicit-function-declaration] return rmnet_map_ipv6_dl_csum_trailer(skb, csum_trailer, priv); ^ drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:438:10: note: did you mean 'rmnet_map_ipv4_dl_csum_trailer'? drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:42:1: note: 'rmnet_map_ipv4_dl_csum_trailer' declared here rmnet_map_ipv4_dl_csum_trailer(struct sk_buff *skb, ^ >> drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:472:3: error: implicit declaration of function 'rmnet_map_ipv6_ul_csum_header' [-Werror,-Wimplicit-function-declaration] rmnet_map_ipv6_ul_csum_header(iphdr, ul_header, skb); ^ drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:472:3: note: did you mean 'rmnet_map_ipv4_ul_csum_header'? drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:198:1: note: 'rmnet_map_ipv4_ul_csum_header' declared here rmnet_map_ipv4_ul_csum_header(void *iphdr, ^ 7 warnings and 2 errors generated. vim +/rmnet_map_ipv6_dl_csum_trailer +438 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 410 bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 411 /* Validates packet checksums. Function takes a pointer to bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 412 * the beginning of a buffer which contains the IP payload + bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 413 * padding + checksum trailer. bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 414 * Only IPv4 and IPv6 are supported along with TCP & UDP. bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 415 * Fragmented or tunneled packets are not supported. bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 416 */ bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 417 int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len) bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 418 { bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 419 struct rmnet_priv *priv = netdev_priv(skb->dev); bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 420 struct rmnet_map_dl_csum_trailer *csum_trailer; bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 421 bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 422 if (unlikely(!(skb->dev->features & NETIF_F_RXCSUM))) { bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 423 priv->stats.csum_sw++; bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 424 return -EOPNOTSUPP; bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 425 } bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 426 bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 427 csum_trailer = (struct rmnet_map_dl_csum_trailer *)(skb->data + len); bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 428 cc1b21ba6251c8 Alex Elder 2021-03-15 429 if (!(csum_trailer->flags & MAP_CSUM_DL_VALID_FLAG)) { bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 430 priv->stats.csum_valid_unset++; bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 431 return -EINVAL; bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 432 } bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 433 75db5b07f8c393 Alex Elder 2021-06-11 434 if (skb->protocol == htons(ETH_P_IP)) bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 435 return rmnet_map_ipv4_dl_csum_trailer(skb, csum_trailer, priv); 75db5b07f8c393 Alex Elder 2021-06-11 436 75db5b07f8c393 Alex Elder 2021-06-11 437 if (IS_ENABLED(CONFIG_IPV6) && skb->protocol == htons(ETH_P_IPV6)) bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 @438 return rmnet_map_ipv6_dl_csum_trailer(skb, csum_trailer, priv); 75db5b07f8c393 Alex Elder 2021-06-11 439 bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 440 priv->stats.csum_err_invalid_ip_version++; bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 441 75db5b07f8c393 Alex Elder 2021-06-11 442 return -EPROTONOSUPPORT; bbd21b247cb596 Subash Abhinov Kasiviswanathan 2018-01-07 443 } 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 444 b6e5d27e32ef60 Sharath Chandra Vurukala 2021-06-02 445 static void rmnet_map_v4_checksum_uplink_packet(struct sk_buff *skb, 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 446 struct net_device *orig_dev) 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 447 { bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 448 struct rmnet_priv *priv = netdev_priv(orig_dev); 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 449 struct rmnet_map_ul_csum_header *ul_header; 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 450 void *iphdr; 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 451 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 452 ul_header = (struct rmnet_map_ul_csum_header *) 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 453 skb_push(skb, sizeof(struct rmnet_map_ul_csum_header)); 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 454 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 455 if (unlikely(!(orig_dev->features & 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 456 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))) 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 457 goto sw_csum; 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 458 75db5b07f8c393 Alex Elder 2021-06-11 459 if (skb->ip_summed != CHECKSUM_PARTIAL) 75db5b07f8c393 Alex Elder 2021-06-11 460 goto sw_csum; 75db5b07f8c393 Alex Elder 2021-06-11 461 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 462 iphdr = (char *)ul_header + 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 463 sizeof(struct rmnet_map_ul_csum_header); 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 464 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 465 if (skb->protocol == htons(ETH_P_IP)) { 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 466 rmnet_map_ipv4_ul_csum_header(iphdr, ul_header, skb); b6e5d27e32ef60 Sharath Chandra Vurukala 2021-06-02 467 priv->stats.csum_hw++; 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 468 return; 75db5b07f8c393 Alex Elder 2021-06-11 469 } 75db5b07f8c393 Alex Elder 2021-06-11 470 75db5b07f8c393 Alex Elder 2021-06-11 471 if (IS_ENABLED(CONFIG_IPV6) && skb->protocol == htons(ETH_P_IPV6)) { 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 @472 rmnet_map_ipv6_ul_csum_header(iphdr, ul_header, skb); b6e5d27e32ef60 Sharath Chandra Vurukala 2021-06-02 473 priv->stats.csum_hw++; 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 474 return; 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 475 } 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 476 75db5b07f8c393 Alex Elder 2021-06-11 477 priv->stats.csum_err_invalid_ip_version++; 75db5b07f8c393 Alex Elder 2021-06-11 478 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 479 sw_csum: 86ca860e12ec0f Alex Elder 2021-03-15 480 memset(ul_header, 0, sizeof(*ul_header)); bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 481 bbde32d38bfbbc Subash Abhinov Kasiviswanathan 2018-05-15 482 priv->stats.csum_sw++; 5eb5f8608ef118 Subash Abhinov Kasiviswanathan 2018-01-07 483 } e1d9a90a9bfdb0 Sharath Chandra Vurukala 2021-06-02 484 :::::: The code at line 438 was first introduced by commit :::::: bbde32d38bfbbc4a6970498c7470a8a817122735 net: qualcomm: rmnet: Add support for ethtool private stats :::::: TO: Subash Abhinov Kasiviswanathan <subashab(a)codeaurora.org&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org