Re: [RFC 2/3] block: use LARGE_ZERO_PAGE in __blkdev_issue_zero_pages()

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

Hi Pankaj,

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

[auto build test ERROR on 9e619cd4fefd19cdce16e169d5827bc64ae01aa1]

url:    https://github.com/intel-lab-lkp/linux/commits/Pankaj-Raghav/mm-add-large-zero-page-for-efficient-zeroing-of-larger-segments/20250516-181327
base:   9e619cd4fefd19cdce16e169d5827bc64ae01aa1
patch link:    https://lore.kernel.org/r/20250516101054.676046-3-p.raghav%40samsung.com
patch subject: [RFC 2/3] block: use LARGE_ZERO_PAGE in __blkdev_issue_zero_pages()
config: arm-randconfig-001-20250517 (https://download.01.org/0day-ci/archive/20250517/202505170820.pZo55E1i-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250517/202505170820.pZo55E1i-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/202505170820.pZo55E1i-lkp@intel.com/

All errors (new ones prefixed by >>):

>> block/blk-lib.c:214:5: error: use of undeclared identifier 'ZERO_LARGE_PAGE_SIZE'
     214 |                                 ZERO_LARGE_PAGE_SIZE, nr_sects << SECTOR_SHIFT);
         |                                 ^
>> block/blk-lib.c:215:30: error: call to undeclared function 'ZERO_LARGE_PAGE'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     215 |                         added = bio_add_page(bio, ZERO_LARGE_PAGE(0), len, 0);
         |                                                   ^
>> block/blk-lib.c:215:30: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'struct page *' [-Wint-conversion]
     215 |                         added = bio_add_page(bio, ZERO_LARGE_PAGE(0), len, 0);
         |                                                   ^~~~~~~~~~~~~~~~~~
   include/linux/bio.h:412:61: note: passing argument to parameter 'page' here
     412 | int __must_check bio_add_page(struct bio *bio, struct page *page, unsigned len,
         |                                                             ^
   3 errors generated.


vim +/ZERO_LARGE_PAGE_SIZE +214 block/blk-lib.c

   194	
   195	static void __blkdev_issue_zero_pages(struct block_device *bdev,
   196			sector_t sector, sector_t nr_sects, gfp_t gfp_mask,
   197			struct bio **biop, unsigned int flags)
   198	{
   199		while (nr_sects) {
   200			unsigned int nr_vecs = __blkdev_sectors_to_bio_pages(nr_sects);
   201			struct bio *bio;
   202	
   203			bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp_mask);
   204			bio->bi_iter.bi_sector = sector;
   205	
   206			if ((flags & BLKDEV_ZERO_KILLABLE) &&
   207			    fatal_signal_pending(current))
   208				break;
   209	
   210			do {
   211				unsigned int len, added;
   212	
   213				len = min_t(sector_t,
 > 214					ZERO_LARGE_PAGE_SIZE, nr_sects << SECTOR_SHIFT);
 > 215				added = bio_add_page(bio, ZERO_LARGE_PAGE(0), len, 0);
   216				if (added < len)
   217					break;
   218				nr_sects -= added >> SECTOR_SHIFT;
   219				sector += added >> SECTOR_SHIFT;
   220			} while (nr_sects);
   221	
   222			*biop = bio_chain_and_submit(*biop, bio);
   223			cond_resched();
   224		}
   225	}
   226	

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