Hi Michal, I love your patch! Perhaps something to improve: [auto build test WARNING on hnaz-mm/master] url: https://github.com/0day-ci/linux/commits/Michal-Hocko/mm-memory_hotplug-m... base: https://github.com/hnaz/linux-mm master config: ia64-defconfig (https://download.01.org/0day-ci/archive/20211215/202112151219.xAI8NaQR-lk...) 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/65c560a3ac2561750c1dc71213f042e66... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Michal-Hocko/mm-memory_hotplug-make-arch_alloc_nodedata-independent-on-CONFIG_MEMORY_HOTPLUG/20211214-190817 git checkout 65c560a3ac2561750c1dc71213f042e660b9bbc0 # 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=ia64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): >> WARNING: modpost: vmlinux.o(.text+0x566a2): Section mismatch in reference from the function arch_alloc_nodedata() to the function .init.text:memblock_alloc_try_nid() The function arch_alloc_nodedata() references the function __init memblock_alloc_try_nid(). This is often because arch_alloc_nodedata lacks a __init annotation or the annotation of memblock_alloc_try_nid is wrong.