[net:master 63/65] csky-linux-ld: sock.c:undefined reference to `__sk_defer_free_flush'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git master
head:   5765cee119bf5a36c94d20eceb37c445508934be
commit: 79074a72d335dbd021a716d8cc65cba3b2f706ab [63/65] net: Flush deferred skb free on socket destroy
config: csky-randconfig-r035-20220117 (https://download.01.org/0day-ci/archive/20220118/202201180610.noKfNl47-lkp@intel.com/config)
compiler: csky-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://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=79074a72d335dbd021a716d8cc65cba3b2f706ab
        git remote add net https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git
        git fetch --no-tags net master
        git checkout 79074a72d335dbd021a716d8cc65cba3b2f706ab
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=csky SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   csky-linux-ld: net/core/sock.o: in function `sk_destruct':
   sock.c:(.text+0x1780): undefined reference to `__sk_defer_free_flush'

quoted

csky-linux-ld: sock.c:(.text+0x17c4): undefined reference to `__sk_defer_free_flush'

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