tree:   https://github.com/congwang/linux.git bpf2
head:   ec3836e59604af89a5f07045ea7a3a1f60ff2cf4
commit: 2efd7231bb06db2dc0ca0414b9873aa139d9684c [1/4] skmsg: introduce sk_psock_get_checked()
config: nds32-buildonly-randconfig-r002-20210927 (attached as .config)
compiler: nds32le-linux-gcc (GCC) 11.2.0
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://github.com/congwang/linux/commit/2efd7231bb06db2dc0ca0414b9873aa139d9684c
        git remote add congwang https://github.com/congwang/linux.git
        git fetch --no-tags congwang bpf2
        git checkout 2efd7231bb06db2dc0ca0414b9873aa139d9684c
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nds32 SHELL=/bin/bash kernel/bpf/

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

All errors (new ones prefixed by >>):

   In file included from kernel/bpf/btf.c:22:
   include/linux/skmsg.h: In function 'sk_psock_get_checked':
>> include/linux/skmsg.h:462:43: error: 'sock_map_close' undeclared (first use in this function); did you mean 'sk_msg_clone'?
     462 |                 if (sk->sk_prot->close != sock_map_close) {
         |                                           ^~~~~~~~~~~~~~
         |                                           sk_msg_clone
   include/linux/skmsg.h:462:43: note: each undeclared identifier is reported only once for each function it appears in
   kernel/bpf/btf.c: In function 'btf_seq_show':
   kernel/bpf/btf.c:5748:29: warning: function 'btf_seq_show' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
    5748 |         seq_vprintf((struct seq_file *)show->target, fmt, args);
         |                             ^~~~~~~~
   kernel/bpf/btf.c: In function 'btf_snprintf_show':
   kernel/bpf/btf.c:5785:9: warning: function 'btf_snprintf_show' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
    5785 |         len = vsnprintf(show->target, ssnprintf->len_left, fmt, args);
         |         ^~~


vim +462 include/linux/skmsg.h

   454	
   455	static inline struct sk_psock *sk_psock_get_checked(struct sock *sk)
   456	{
   457		struct sk_psock *psock;
   458	
   459		rcu_read_lock();
   460		psock = sk_psock(sk);
   461		if (psock) {
 > 462			if (sk->sk_prot->close != sock_map_close) {
   463				psock = ERR_PTR(-EBUSY);
   464				goto out;
   465			}
   466	
   467			if (!refcount_inc_not_zero(&psock->refcnt))
   468				psock = ERR_PTR(-EBUSY);
   469		}
   470	out:
   471		rcu_read_unlock();
   472		return psock;
   473	}
   474	

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