Re: [RFC net-next 05/15] ipxlat: add IPv6 packet validation path

[kernel test robot <lkp@intel.com>]

Hi Ralf,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Ralf-Lici/drivers-net-add-ipxlat-netdevice-skeleton-and-build-plumbing/20260321-005756
base:   net-next/main
patch link:    https://lore.kernel.org/r/20260319151230.655687-6-ralf%40mandelbit.com
patch subject: [RFC net-next 05/15] ipxlat: add IPv6 packet validation path
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20260322/202603221453.u8DVY8ud-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260322/202603221453.u8DVY8ud-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603221453.u8DVY8ud-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/net/ipxlat/packet.c:452:18: warning: variable 'ip6' set but not used [-Wunused-but-set-variable]
     452 |         struct ipv6hdr *ip6;
         |                         ^
>> drivers/net/ipxlat/packet.c:686:9: error: call to undeclared function 'csum_ipv6_magic'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     686 |         csum = csum_ipv6_magic(&iph6->saddr, &iph6->daddr, len, NEXTHDR_ICMP,
         |                ^
   drivers/net/ipxlat/packet.c:686:9: note: did you mean 'csum_tcpudp_magic'?
   arch/hexagon/include/asm/checksum.h:21:9: note: 'csum_tcpudp_magic' declared here
      21 | __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
         |         ^
   arch/hexagon/include/asm/checksum.h:20:27: note: expanded from macro 'csum_tcpudp_magic'
      20 | #define csum_tcpudp_magic csum_tcpudp_magic
         |                           ^
   1 warning and 1 error generated.


vim +/csum_ipv6_magic +686 drivers/net/ipxlat/packet.c

   674	
   675	static int ipxlat_v6_validate_icmp_csum(const struct sk_buff *skb)
   676	{
   677		struct ipv6hdr *iph6;
   678		unsigned int len;
   679		__sum16 csum;
   680	
   681		if (skb->ip_summed != CHECKSUM_NONE)
   682			return 0;
   683	
   684		iph6 = ipv6_hdr(skb);
   685		len = ipxlat_skb_datagram_len(skb);
 > 686		csum = csum_ipv6_magic(&iph6->saddr, &iph6->daddr, len, NEXTHDR_ICMP,
   687				       skb_checksum(skb, skb_transport_offset(skb), len,
   688						    0));
   689	
   690		return unlikely(csum) ? -EINVAL : 0;
   691	}
   692	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki