On Fri, Apr 27, 2018 at 1:45 AM kbuild test robot <lkp@xxxxxxxxx> wrote: > Hi Eric, > 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/Eric-Dumazet/tcp-add-TCP_ZEROCOPY_RECEIVE-support-for-zerocopy-receive/20180427-122234 > config: sh-rsk7269_defconfig (attached as .config) > compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 > reproduce: > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # save the attached .config to linux build tree > make.cross ARCH=sh > All errors (new ones prefixed by >>): > net/ipv4/tcp.o: In function `tcp_setsockopt': > >> tcp.c:(.text+0x3f80): undefined reference to `zap_page_range' I guess this tcp zerocopy stuff depends on CONFIG_MMU Thanks.
