Re: [PATCH RFC 2/3] mm/secretmem: implement mm-local kernel allocations

[kernel test robot <lkp@intel.com>]

Hi Roman,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus shuah-kselftest/next shuah-kselftest/fixes linus/master v6.10-rc5 next-20240626]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Roman-Kagan/mseal-expose-interface-to-seal-unseal-user-memory-ranges/20240625-174709
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20240621201501.1059948-3-rkagan%40amazon.de
patch subject: [PATCH RFC 2/3] mm/secretmem: implement mm-local kernel allocations
config: parisc-allnoconfig (https://download.01.org/0day-ci/archive/20240627/202406270637.kuvejkNW-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240627/202406270637.kuvejkNW-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406270637.kuvejkNW-lkp@intel.com/

All errors (new ones prefixed by >>):

   mm/gup.c: In function 'follow_page':
>> mm/gup.c:1175:14: error: implicit declaration of function 'can_access_secretmem_vma' [-Werror=implicit-function-declaration]
    1175 |         if (!can_access_secretmem_vma(vma))
         |              ^~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/can_access_secretmem_vma +1175 mm/gup.c

  1168	
  1169	struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
  1170				 unsigned int foll_flags)
  1171	{
  1172		struct follow_page_context ctx = { NULL };
  1173		struct page *page;
  1174	
> 1175		if (!can_access_secretmem_vma(vma))
  1176			return NULL;
  1177	
  1178		if (WARN_ON_ONCE(foll_flags & FOLL_PIN))
  1179			return NULL;
  1180	
  1181		/*
  1182		 * We never set FOLL_HONOR_NUMA_FAULT because callers don't expect
  1183		 * to fail on PROT_NONE-mapped pages.
  1184		 */
  1185		page = follow_page_mask(vma, address, foll_flags, &ctx);
  1186		if (ctx.pgmap)
  1187			put_dev_pagemap(ctx.pgmap);
  1188		return page;
  1189	}
  1190	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki