Re: [PATCHv2 6/7] blk-mq-dma: add support for mapping integrity metadata

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

Hi Keith,

kernel test robot noticed the following build warnings:

[auto build test WARNING on axboe-block/for-next]
[cannot apply to linux-nvme/for-next hch-configfs/for-next linus/master v6.16-rc7 next-20250718]
[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/Keith-Busch/blk-mq-dma-move-the-bio-and-bvec_iter-to-blk_dma_iter/20250721-024616
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20250720184040.2402790-7-kbusch%40meta.com
patch subject: [PATCHv2 6/7] blk-mq-dma: add support for mapping integrity metadata
config: riscv-randconfig-001-20250721 (https://download.01.org/0day-ci/archive/20250721/202507211037.lzkMQLrY-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 16534d19bf50bde879a83f0ae62875e2c5120e64)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250721/202507211037.lzkMQLrY-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/202507211037.lzkMQLrY-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from block/blk-mq.c:13:
>> include/linux/blk-integrity.h:117:6: warning: no previous prototype for function 'blk_rq_integrity_dma_map_iter_start' [-Wmissing-prototypes]
     117 | bool blk_rq_integrity_dma_map_iter_start(struct request *req,
         |      ^
   include/linux/blk-integrity.h:117:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     117 | bool blk_rq_integrity_dma_map_iter_start(struct request *req,
         | ^
         | static 
>> include/linux/blk-integrity.h:123:6: warning: no previous prototype for function 'blk_rq_integrity_dma_map_iter_next' [-Wmissing-prototypes]
     123 | bool blk_rq_integrity_dma_map_iter_next(struct request *req,
         |      ^
   include/linux/blk-integrity.h:123:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     123 | bool blk_rq_integrity_dma_map_iter_next(struct request *req,
         | ^
         | static 
   2 warnings generated.
--
   In file included from block/blk-mq-dma.c:5:
>> include/linux/blk-integrity.h:117:6: warning: no previous prototype for function 'blk_rq_integrity_dma_map_iter_start' [-Wmissing-prototypes]
     117 | bool blk_rq_integrity_dma_map_iter_start(struct request *req,
         |      ^
   include/linux/blk-integrity.h:117:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     117 | bool blk_rq_integrity_dma_map_iter_start(struct request *req,
         | ^
         | static 
>> include/linux/blk-integrity.h:123:6: warning: no previous prototype for function 'blk_rq_integrity_dma_map_iter_next' [-Wmissing-prototypes]
     123 | bool blk_rq_integrity_dma_map_iter_next(struct request *req,
         |      ^
   include/linux/blk-integrity.h:123:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     123 | bool blk_rq_integrity_dma_map_iter_next(struct request *req,
         | ^
         | static 
   block/blk-mq-dma.c:23:27: error: no member named 'bi_integrity' in 'struct bio'
      23 |                 iter->iter = iter->bio->bi_integrity->bip_iter;
         |                              ~~~~~~~~~  ^
   block/blk-mq-dma.c:24:27: error: no member named 'bi_integrity' in 'struct bio'
      24 |                 iter->bvec = iter->bio->bi_integrity->bip_vec;
         |                              ~~~~~~~~~  ^
   2 warnings and 2 errors generated.


vim +/blk_rq_integrity_dma_map_iter_start +117 include/linux/blk-integrity.h

    90	
    91	/*
    92	 * Return the current bvec that contains the integrity data. bip_iter may be
    93	 * advanced to iterate over the integrity data.
    94	 */
    95	static inline struct bio_vec rq_integrity_vec(struct request *rq)
    96	{
    97		return mp_bvec_iter_bvec(rq->bio->bi_integrity->bip_vec,
    98					 rq->bio->bi_integrity->bip_iter);
    99	}
   100	#else /* CONFIG_BLK_DEV_INTEGRITY */
   101	static inline int blk_rq_count_integrity_sg(struct request_queue *q,
   102						    struct bio *b)
   103	{
   104		return 0;
   105	}
   106	static inline int blk_rq_map_integrity_sg(struct request *q,
   107						  struct scatterlist *s)
   108	{
   109		return 0;
   110	}
   111	static inline int blk_rq_integrity_map_user(struct request *rq,
   112						    void __user *ubuf,
   113						    ssize_t bytes)
   114	{
   115		return -EINVAL;
   116	}
 > 117	bool blk_rq_integrity_dma_map_iter_start(struct request *req,
   118			struct device *dma_dev,  struct dma_iova_state *state,
   119			struct blk_dma_iter *iter)
   120	{
   121		return false;
   122	}
 > 123	bool blk_rq_integrity_dma_map_iter_next(struct request *req,
   124			struct device *dma_dev, struct blk_dma_iter *iter)
   125	{
   126		return false;
   127	}
   128	static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)
   129	{
   130		return NULL;
   131	}
   132	static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
   133	{
   134		return NULL;
   135	}
   136	static inline bool
   137	blk_integrity_queue_supports_integrity(struct request_queue *q)
   138	{
   139		return false;
   140	}
   141	static inline unsigned short
   142	queue_max_integrity_segments(const struct request_queue *q)
   143	{
   144		return 0;
   145	}
   146	

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