Re: [PATCH 14/15] block: blk-integrity: change sg-table configuration method for integrity

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

Hi Jinyoung,

kernel test robot noticed the following build errors:

[auto build test ERROR on axboe-block/for-next]
[also build test ERROR on mkp-scsi/for-next jejb-scsi/for-next linus/master v6.3 next-20230428]
[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/Jinyoung-CHOI/block-blk-integiry-add-helper-functions-for-bio_integrity_add_page/20230503-183015
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20230503102719epcms2p457434fefd535ee43d502eff854227919%40epcms2p4
patch subject: [PATCH 14/15] block: blk-integrity: change sg-table configuration method for integrity
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20230503/202305032213.JHLycY4F-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/7e4810d74ca92ed35bbc73cb09a4baa1dacfbc96
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jinyoung-CHOI/block-blk-integiry-add-helper-functions-for-bio_integrity_add_page/20230503-183015
        git checkout 7e4810d74ca92ed35bbc73cb09a4baa1dacfbc96
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SUBARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305032213.JHLycY4F-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/blk-integrity.h:5,
                    from block/blk-merge.c:9:
   include/linux/blk-mq.h: In function 'blk_rq_bio_prep':
   include/linux/blk-mq.h:972:19: error: 'struct request' has no member named 'nr_integrity_segments'
     972 |                 rq->nr_integrity_segments = bio_integrity(bio)->bip_vcnt;
         |                   ^~
   include/linux/blk-mq.h:972:63: warning: dereferencing 'void *' pointer
     972 |                 rq->nr_integrity_segments = bio_integrity(bio)->bip_vcnt;
         |                                                               ^~
   include/linux/blk-mq.h:972:63: error: request for member 'bip_vcnt' in something not a structure or union
   block/blk-merge.c: At top level:
>> block/blk-merge.c:536:5: error: redefinition of 'blk_rq_map_integrity_sg'
     536 | int blk_rq_map_integrity_sg(struct request_queue *q, struct bio *bio,
         |     ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from block/blk-merge.c:9:
   include/linux/blk-integrity.h:132:19: note: previous definition of 'blk_rq_map_integrity_sg' with type 'int(struct request_queue *, struct bio *, struct scatterlist *)'
     132 | static inline int blk_rq_map_integrity_sg(struct request_queue *q,
         |                   ^~~~~~~~~~~~~~~~~~~~~~~
   block/blk-merge.c: In function 'blk_rq_map_integrity_sg':
>> block/blk-merge.c:546:56: error: 'struct bio' has no member named 'bi_integrity'
     546 |                 struct bio_integrity_payload *bip = bio->bi_integrity;
         |                                                        ^~
>> block/blk-merge.c:548:17: error: implicit declaration of function 'bip_for_each_mp_bvec'; did you mean 'for_each_mp_bvec'? [-Werror=implicit-function-declaration]
     548 |                 bip_for_each_mp_bvec(iv, bip, iter) {
         |                 ^~~~~~~~~~~~~~~~~~~~
         |                 for_each_mp_bvec
>> block/blk-merge.c:548:52: error: expected ';' before '{' token
     548 |                 bip_for_each_mp_bvec(iv, bip, iter) {
         |                                                    ^~
         |                                                    ;
   block/blk-merge.c:543:14: warning: unused variable 'new_bio' [-Wunused-variable]
     543 |         bool new_bio = false;
         |              ^~~~~~~
   block/blk-merge.c:539:28: warning: unused variable 'ivprv' [-Wunused-variable]
     539 |         struct bio_vec iv, ivprv = { NULL };
         |                            ^~~~~
   cc1: some warnings being treated as errors


vim +/blk_rq_map_integrity_sg +536 block/blk-merge.c

   526	
   527	/**
   528	 * blk_rq_map_integrity_sg - Map integrity metadata into a scatterlist
   529	 * @q:		request queue
   530	 * @bio:	bio with integrity metadata attached
   531	 * @sglist:	target scatterlist
   532	 *
   533	 * Description: Map the integrity vectors in request into a scatterlist.
   534	 * The scatterlist must be big enough to hold all elements.
   535	 */
 > 536	int blk_rq_map_integrity_sg(struct request_queue *q, struct bio *bio,
   537				    struct scatterlist *sglist)
   538	{
   539		struct bio_vec iv, ivprv = { NULL };
   540		struct scatterlist *sg = NULL;
   541		unsigned int nsegs = 0;
   542		struct bvec_iter iter;
   543		bool new_bio = false;
   544	
   545		for_each_bio(bio) {
 > 546			struct bio_integrity_payload *bip = bio->bi_integrity;
   547	
 > 548			bip_for_each_mp_bvec(iv, bip, iter) {
   549				/*
   550				 * Only try to merge bvecs from two bios given we
   551				 * have done bio internal merge when adding pages
   552				 * to bio
   553				 */
   554				if (new_bio &&
   555				    __blk_segment_map_sg_merge(q, &iv, &ivprv, &sg))
   556					goto next_iv;
   557	
   558				if (iv.bv_offset + iv.bv_len <= PAGE_SIZE)
   559					nsegs += __blk_bvec_map_sg(iv, sglist, &sg);
   560				else
   561					nsegs += blk_bvec_map_sg(q, &iv, sglist, &sg);
   562	 next_iv:
   563				new_bio = false;
   564			}
   565	
   566			if (likely(bip->bip_iter.bi_size)) {
   567				ivprv = iv;
   568				new_bio = true;
   569			}
   570		}
   571	
   572		if (sg)
   573			sg_mark_end(sg);
   574	
   575		return nsegs;
   576	}
   577	EXPORT_SYMBOL(blk_rq_map_integrity_sg);
   578	

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