Hi Hangyu, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] [also build test ERROR on net/master horms-ipvs/master linus/master v6.2 next-20230221] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Hangyu-Hua/net-dccp-delete-redundant-ackvec-record-in-dccp_insert_options/20230221-172448 patch link: https://lore.kernel.org/r/20230221092206.39741-1-hbh25y%40gmail.com patch subject: [PATCH] net: dccp: delete redundant ackvec record in dccp_insert_options() config: s390-randconfig-r011-20230220 (https://download.01.org/0day-ci/archive/20230222/202302220153.QeW2n6o4-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/ea44b55ba82bbe3f35b51212bf839f507a30b70b git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Hangyu-Hua/net-dccp-delete-redundant-ackvec-record-in-dccp_insert_options/20230221-172448 git checkout ea44b55ba82bbe3f35b51212bf839f507a30b70b # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash net/dccp/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202302220153.QeW2n6o4-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from net/dccp/options.c:10: In file included from include/linux/dccp.h:13: In file included from include/net/inet_connection_sock.h:21: In file included from include/net/inet_sock.h:19: In file included from include/linux/netdevice.h:38: In file included from include/net/net_namespace.h:43: In file included from include/linux/skbuff.h:28: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from net/dccp/options.c:10: In file included from include/linux/dccp.h:13: In file included from include/net/inet_connection_sock.h:21: In file included from include/net/inet_sock.h:19: In file included from include/linux/netdevice.h:38: In file included from include/net/net_namespace.h:43: In file included from include/linux/skbuff.h:28: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from net/dccp/options.c:10: In file included from include/linux/dccp.h:13: In file included from include/net/inet_connection_sock.h:21: In file included from include/net/inet_sock.h:19: In file included from include/linux/netdevice.h:38: In file included from include/net/net_namespace.h:43: In file included from include/linux/skbuff.h:28: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> net/dccp/options.c:594:8: error: call to undeclared function 'dccp_ackvec_lookup'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] avr = dccp_ackvec_lookup(&av->av_records, DCCP_SKB_CB(skb)->dccpd_seq); ^ >> net/dccp/options.c:594:6: error: incompatible integer to pointer conversion assigning to 'struct dccp_ackvec_record *' from 'int' [-Wint-conversion] avr = dccp_ackvec_lookup(&av->av_records, DCCP_SKB_CB(skb)->dccpd_seq); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> net/dccp/options.c:596:18: error: use of undeclared identifier 'dccp_ackvec_record_slab'; did you mean 'dccp_ackvec_clear_state'? kmem_cache_free(dccp_ackvec_record_slab, avr); ^~~~~~~~~~~~~~~~~~~~~~~ dccp_ackvec_clear_state net/dccp/ackvec.h:110:6: note: 'dccp_ackvec_clear_state' declared here void dccp_ackvec_clear_state(struct dccp_ackvec *av, const u64 ackno); ^ 12 warnings and 3 errors generated. vim +/dccp_ackvec_lookup +594 net/dccp/options.c 548 549 int dccp_insert_options(struct sock *sk, struct sk_buff *skb) 550 { 551 struct dccp_sock *dp = dccp_sk(sk); 552 struct dccp_ackvec *av = dp->dccps_hc_rx_ackvec; 553 struct dccp_ackvec_record *avr; 554 555 DCCP_SKB_CB(skb)->dccpd_opt_len = 0; 556 557 if (dp->dccps_send_ndp_count && dccp_insert_option_ndp(sk, skb)) 558 return -1; 559 560 if (DCCP_SKB_CB(skb)->dccpd_type != DCCP_PKT_DATA) { 561 562 /* Feature Negotiation */ 563 if (dccp_feat_insert_opts(dp, NULL, skb)) 564 return -1; 565 566 if (DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_REQUEST) { 567 /* 568 * Obtain RTT sample from Request/Response exchange. 569 * This is currently used for TFRC initialisation. 570 */ 571 if (dccp_insert_option_timestamp(skb)) 572 return -1; 573 574 } else if (dccp_ackvec_pending(sk) && 575 dccp_insert_option_ackvec(sk, skb)) { 576 return -1; 577 } 578 } 579 580 if (dp->dccps_hc_rx_insert_options) { 581 if (ccid_hc_rx_insert_options(dp->dccps_hc_rx_ccid, sk, skb)) 582 goto delete_ackvec; 583 dp->dccps_hc_rx_insert_options = 0; 584 } 585 586 if (dp->dccps_timestamp_echo != 0 && 587 dccp_insert_option_timestamp_echo(dp, NULL, skb)) 588 goto delete_ackvec; 589 590 dccp_insert_option_padding(skb); 591 return 0; 592 593 delete_ackvec: > 594 avr = dccp_ackvec_lookup(&av->av_records, DCCP_SKB_CB(skb)->dccpd_seq); 595 list_del(&avr->avr_node); > 596 kmem_cache_free(dccp_ackvec_record_slab, avr); 597 return -1; 598 } 599 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
