Messages in this thread | | | Date | Sat, 6 Nov 2021 08:44:24 +0800 | From | kernel test robot <> | Subject | [dborkman-bpf:pr/bpf-tstamp 3/3] drivers/net/ethernet/intel/fm10k/fm10k_main.c:878:16: warning: division by zero is undefined |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/dborkman/bpf.git pr/bpf-tstamp head: f7d619a946e981177777983af26e9e31163ffb38 commit: f7d619a946e981177777983af26e9e31163ffb38 [3/3] net: skb clock bases config: x86_64-randconfig-a006-20210928 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) 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/dborkman/bpf.git/commit/?id=f7d619a946e981177777983af26e9e31163ffb38 git remote add dborkman-bpf https://git.kernel.org/pub/scm/linux/kernel/git/dborkman/bpf.git git fetch --no-tags dborkman-bpf pr/bpf-tstamp git checkout f7d619a946e981177777983af26e9e31163ffb38 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from drivers/net/ethernet/intel/fm10k/fm10k_main.c:8: include/net/tcp.h:812:27: error: no member named 'skb_mstamp_ns' in 'struct sk_buff' return tcp_ns_to_ts(skb->skb_mstamp_ns); ~~~ ^ include/net/tcp.h:818:22: error: no member named 'skb_mstamp_ns' in 'struct sk_buff' return div_u64(skb->skb_mstamp_ns, NSEC_PER_USEC); ~~~ ^ include/net/tcp.h:2367:8: error: no member named 'skb_mstamp_ns' in 'struct sk_buff' skb->skb_mstamp_ns += (u64)tp->tcp_tx_delay * NSEC_PER_USEC; ~~~ ^ >> drivers/net/ethernet/intel/fm10k/fm10k_main.c:878:16: warning: division by zero is undefined [-Wdivision-by-zero] desc_flags |= FM10K_SET_FLAG(tx_flags, FM10K_TX_FLAGS_CSUM, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/intel/fm10k/fm10k_main.c:870:26: note: expanded from macro 'FM10K_SET_FLAG' ((u32)(_input & _flag) / (_flag / _result))) ^ ~~~~~~~~~~~~~~~~~ 1 warning and 3 errors generated.
vim +878 drivers/net/ethernet/intel/fm10k/fm10k_main.c
76a540d4728a37 Alexander Duyck 2014-09-20 866 76a540d4728a37 Alexander Duyck 2014-09-20 867 #define FM10K_SET_FLAG(_input, _flag, _result) \ 76a540d4728a37 Alexander Duyck 2014-09-20 868 ((_flag <= _result) ? \ 76a540d4728a37 Alexander Duyck 2014-09-20 869 ((u32)(_input & _flag) * (_result / _flag)) : \ 76a540d4728a37 Alexander Duyck 2014-09-20 870 ((u32)(_input & _flag) / (_flag / _result))) 76a540d4728a37 Alexander Duyck 2014-09-20 871 76a540d4728a37 Alexander Duyck 2014-09-20 872 static u8 fm10k_tx_desc_flags(struct sk_buff *skb, u32 tx_flags) 76a540d4728a37 Alexander Duyck 2014-09-20 873 { 76a540d4728a37 Alexander Duyck 2014-09-20 874 /* set type for advanced descriptor with frame checksum insertion */ 76a540d4728a37 Alexander Duyck 2014-09-20 875 u32 desc_flags = 0; 76a540d4728a37 Alexander Duyck 2014-09-20 876 76a540d4728a37 Alexander Duyck 2014-09-20 877 /* set checksum offload bits */ 76a540d4728a37 Alexander Duyck 2014-09-20 @878 desc_flags |= FM10K_SET_FLAG(tx_flags, FM10K_TX_FLAGS_CSUM, 76a540d4728a37 Alexander Duyck 2014-09-20 879 FM10K_TXD_FLAG_CSUM); 76a540d4728a37 Alexander Duyck 2014-09-20 880 76a540d4728a37 Alexander Duyck 2014-09-20 881 return desc_flags; 76a540d4728a37 Alexander Duyck 2014-09-20 882 } 76a540d4728a37 Alexander Duyck 2014-09-20 883
:::::: The code at line 878 was first introduced by commit :::::: 76a540d4728a379e022fb2e2e8766d502b6d345c fm10k: Add support for netdev offloads
:::::: TO: Alexander Duyck <alexander.h.duyck@intel.com> :::::: CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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