Hi "Uladzislau, Thank you for the patch! Yet something to improve: [auto build test ERROR on rcu/dev] [also build test ERROR on linux/master linus/master v5.12-rc2 next-20210305] [cannot apply to hnaz-linux-mm/master] [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/Uladzislau-Rezki-Sony/kvfree_rcu-Release-a-page-cache-under-memory-pressure/20210309-035155 base: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev config: arc-defconfig (attached as .config) compiler: arc-elf-gcc (GCC) 9.3.0 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/d1c3a54d06b2b088b2a7b4e7f2a0a85bcbfbf53a git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Uladzislau-Rezki-Sony/kvfree_rcu-Release-a-page-cache-under-memory-pressure/20210309-035155 git checkout d1c3a54d06b2b088b2a7b4e7f2a0a85bcbfbf53a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arc-elf-ld: kernel/rcu/tree.o: in function `kvfree_call_rcu': >> tree.c:(.text+0x291a): undefined reference to `__xchg_bad_pointer' >> arc-elf-ld: tree.c:(.text+0x291a): undefined reference to `__xchg_bad_pointer' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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