Hi Yi, [auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Yi-Yang/openvswitch-enable-NSH-support/20170822-184251 config: x86_64-randconfig-a0-08230538 (attached as .config) compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): net//openvswitch/flow.c: In function 'parse_nsh': >> net//openvswitch/flow.c:498: warning: unused variable 'err' vim +/err +498 net//openvswitch/flow.c 493 494 static int parse_nsh(struct sk_buff *skb, struct sw_flow_key *key) 495 { 496 struct nsh_hdr *nsh = (struct nsh_hdr *)skb_network_header(skb); 497 u8 version, length; > 498 int err; 499 500 if (unlikely(skb->len < NSH_BASE_HDR_LEN)) 501 return -EINVAL; 502 503 version = nsh_get_ver(nsh); 504 length = nsh_hdr_len(nsh); 505 506 if (version != 0) 507 return -EINVAL; 508 509 if (unlikely(skb->len < length)) 510 return -EINVAL; 511 512 key->nsh.flags = nsh_get_flags(nsh); 513 key->nsh.ttl = nsh_get_ttl(nsh); 514 key->nsh.mdtype = nsh->md_type; 515 key->nsh.np = nsh->next_proto; 516 key->nsh.path_hdr = nsh->path_hdr; 517 switch (key->nsh.mdtype) { 518 case NSH_M_TYPE1: 519 if (length != NSH_M_TYPE1_LEN) 520 return -EINVAL; 521 memcpy(key->nsh.context, nsh->md1.context, 522 sizeof(nsh->md1)); 523 break; 524 case NSH_M_TYPE2: 525 /* Don't support MD type 2 metedata parsing yet */ 526 if (length < NSH_BASE_HDR_LEN) 527 return -EINVAL; 528 529 memset(key->nsh.context, 0, 530 sizeof(nsh->md1)); 531 break; 532 default: 533 return -EINVAL; 534 } 535 536 return 0; 537 } 538 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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