Hi Mike,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on linus/master]
[also build test WARNING on v5.12-rc2 next-20210305]
[cannot apply to linux/master 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/Mike-Kravetz/hugetlb-add-demote-split-page-functionality/20210309-081944
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32
config: x86_64-randconfig-a001-20210308 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/627df591b218dc2298287c18f8ea98de376becfc
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Mike-Kravetz/hugetlb-add-demote-split-page-functionality/20210309-081944
        git checkout 627df591b218dc2298287c18f8ea98de376becfc
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> WARNING: modpost: vmlinux.o(.text+0x2e178e): Section mismatch in reference from the function demote_store_action() to the function .init.text:prep_compound_huge_page()
The function demote_store_action() references
the function __init prep_compound_huge_page().
This is often because demote_store_action lacks a __init
annotation or the annotation of prep_compound_huge_page is wrong.

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