Hi Yunsheng,

Thank you for the patch! Yet something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Yunsheng-Lin/some-optimization-for-page-pool/20211009-174023
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git f12e658c620a925aba4caead54a05eb157728863
config: ia64-defconfig (attached as .config)
compiler: ia64-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/0day-ci/linux/commit/d58490b58ef2cfa172d5e1ff2d13b713a6d38969
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Yunsheng-Lin/some-optimization-for-page-pool/20211009-174023
        git checkout d58490b58ef2cfa172d5e1ff2d13b713a6d38969
        # 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=ia64 SHELL=/bin/bash

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 >>):

   ia64-linux-ld: net/core/skbuff.o: in function `skb_free_head':
>> skbuff.c:(.text+0x6c92): undefined reference to `page_pool_return_skb_page'

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