tree:   https://github.com/sbates130272/linux-p2pmem.git p2pdma_user_cmb_v4
head:   fafffd8dc69edfad4ffca8e67bd6520f3a1a004f
commit: 2f33a0989872f1edd3353c300c33f6671f6d0d3c [18/24] block: add check when merging zone device pages
config: arc-randconfig-r043-20211001 (attached as .config)
compiler: arceb-elf-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/sbates130272/linux-p2pmem/commit/2f33a0989872f1edd3353c300c33f6671f6d0d3c
        git remote add sbates130272-p2pmem https://github.com/sbates130272/linux-p2pmem.git
        git fetch --no-tags sbates130272-p2pmem p2pdma_user_cmb_v4
        git checkout 2f33a0989872f1edd3353c300c33f6671f6d0d3c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc 

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

All errors (new ones prefixed by >>):

   block/bio.c: In function 'page_is_mergeable':
>> block/bio.c:787:14: error: implicit declaration of function 'zone_device_pages_are_mergeable'; did you mean 'zone_device_pages_are_mergable'? [-Werror=implicit-function-declaration]
     787 |         if (!zone_device_pages_are_mergeable(bv->bv_page, page))
         |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         |              zone_device_pages_are_mergable
   cc1: some warnings being treated as errors


vim +787 block/bio.c

   774	
   775	static inline bool page_is_mergeable(const struct bio_vec *bv,
   776			struct page *page, unsigned int len, unsigned int off,
   777			bool *same_page)
   778	{
   779		size_t bv_end = bv->bv_offset + bv->bv_len;
   780		phys_addr_t vec_end_addr = page_to_phys(bv->bv_page) + bv_end - 1;
   781		phys_addr_t page_addr = page_to_phys(page);
   782	
   783		if (vec_end_addr + 1 != page_addr + off)
   784			return false;
   785		if (xen_domain() && !xen_biovec_phys_mergeable(bv, page))
   786			return false;
 > 787		if (!zone_device_pages_are_mergeable(bv->bv_page, page))
   788			return false;
   789	
   790		*same_page = ((vec_end_addr & PAGE_MASK) == page_addr);
   791		if (*same_page)
   792			return true;
   793		return (bv->bv_page + bv_end / PAGE_SIZE) == (page + off / PAGE_SIZE);
   794	}
   795	

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