[PATCH] net: untag pointer in sockptr_is_kernel

[kernel test robot]

Hi Miles,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on net-next/master]
[also build test ERROR on linus/master]
[cannot apply to net/master hch-configfs/for-next sparc-next/master v5.8 next-20200811]
[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]

url:    https://github.com/0day-ci/linux/commits/Miles-Chen/net-untag-pointer-in-sockptr_is_kernel/20200811-183033
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git bfdd5aaa54b0a44d9df550fe4c9db7e1470a11b8
config: x86_64-randconfig-a013-20200811 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4f2ad15db535873dda9bfe248a2771023b64a43c)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All errors (new ones prefixed by >>):

   In file included from net/ipv6/af_inet6.c:29:
   In file included from include/linux/net.h:24:
>> include/linux/sockptr.h:23:24: error: implicit declaration of function 'untagged_addr' [-Werror,-Wimplicit-function-declaration]
           return (unsigned long)untagged_addr(sockptr.kernel) >= TASK_SIZE;
                                 ^
   1 error generated.
--
   In file included from net/ipv6/udp.c:24:
   In file included from include/linux/net.h:24:
>> include/linux/sockptr.h:23:24: error: implicit declaration of function 'untagged_addr' [-Werror,-Wimplicit-function-declaration]
           return (unsigned long)untagged_addr(sockptr.kernel) >= TASK_SIZE;
                                 ^
   net/ipv6/udp.c:1029:30: warning: no previous prototype for function 'udp_v6_early_demux' [-Wmissing-prototypes]
   INDIRECT_CALLABLE_SCOPE void udp_v6_early_demux(struct sk_buff *skb)
                                ^
   net/ipv6/udp.c:1029:25: note: declare 'static' if the function is not intended to be used outside of this translation unit
   INDIRECT_CALLABLE_SCOPE void udp_v6_early_demux(struct sk_buff *skb)
                           ^
                           static 
   net/ipv6/udp.c:1070:29: warning: no previous prototype for function 'udpv6_rcv' [-Wmissing-prototypes]
   INDIRECT_CALLABLE_SCOPE int udpv6_rcv(struct sk_buff *skb)
                               ^
   net/ipv6/udp.c:1070:25: note: declare 'static' if the function is not intended to be used outside of this translation unit
   INDIRECT_CALLABLE_SCOPE int udpv6_rcv(struct sk_buff *skb)
                           ^
                           static 
   2 warnings and 1 error generated.

vim +/untagged_addr +23 include/linux/sockptr.h

    20	
    21	static inline bool sockptr_is_kernel(sockptr_t sockptr)
    22	{
  > 23		return (unsigned long)untagged_addr(sockptr.kernel) >= TASK_SIZE;
    24	}
    25	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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