tree:   https://github.com/ammarfaizi2/linux-block axboe/linux-block/perf-wip.2
head:   53c6dc373fcb6f58ae3dcda07c99fc1e70e1c923
commit: a377b58a5e225a2a0336956fd2442e8b2f023172 [1/14] block: optimise blk_may_split for normal rw
config: nios2-randconfig-s043-20221218
compiler: nios2-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/ammarfaizi2/linux-block/commit/a377b58a5e225a2a0336956fd2442e8b2f023172
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block axboe/linux-block/perf-wip.2
        git checkout a377b58a5e225a2a0336956fd2442e8b2f023172
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 SHELL=/bin/bash

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

sparse warnings: (new ones prefixed by >>)
   block/blk-merge.c: note: in included file:
>> block/blk.h:298:33: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned int op @@     got restricted blk_opf_t enum req_op @@
   block/blk.h:298:33: sparse:     expected unsigned int op
   block/blk.h:298:33: sparse:     got restricted blk_opf_t enum req_op
>> block/blk.h:300:19: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:300:40: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:300:62: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:302:22: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:303:22: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:304:22: sparse: sparse: restricted blk_opf_t degrades to integer
--
   block/blk-mq.c: note: in included file:
>> block/blk.h:298:33: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned int op @@     got restricted blk_opf_t enum req_op @@
   block/blk.h:298:33: sparse:     expected unsigned int op
   block/blk.h:298:33: sparse:     got restricted blk_opf_t enum req_op
>> block/blk.h:300:19: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:300:40: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:300:62: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:302:22: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:303:22: sparse: sparse: restricted blk_opf_t degrades to integer
   block/blk.h:304:22: sparse: sparse: restricted blk_opf_t degrades to integer

vim +298 block/blk.h

   280	
   281	ssize_t part_size_show(struct device *dev, struct device_attribute *attr,
   282			char *buf);
   283	ssize_t part_stat_show(struct device *dev, struct device_attribute *attr,
   284			char *buf);
   285	ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
   286			char *buf);
   287	ssize_t part_fail_show(struct device *dev, struct device_attribute *attr,
   288			char *buf);
   289	ssize_t part_fail_store(struct device *dev, struct device_attribute *attr,
   290			const char *buf, size_t count);
   291	ssize_t part_timeout_show(struct device *, struct device_attribute *, char *);
   292	ssize_t part_timeout_store(struct device *, struct device_attribute *,
   293					const char *, size_t);
   294	
   295	static inline bool bio_may_exceed_limits(struct bio *bio,
   296						 const struct queue_limits *lim)
   297	{
 > 298		unsigned int op = bio_op(bio);
   299	
 > 300		if (op != REQ_OP_READ && op != REQ_OP_WRITE && op != REQ_OP_FLUSH) {
   301			switch (op) {
   302			case REQ_OP_DISCARD:
   303			case REQ_OP_SECURE_ERASE:
   304			case REQ_OP_WRITE_ZEROES:
   305				return true; /* non-trivial splitting decisions */
   306			default:
   307				break;
   308			}
   309		}
   310	
   311		/*
   312		 * All drivers must accept single-segments bios that are <= PAGE_SIZE.
   313		 * This is a quick and dirty check that relies on the fact that
   314		 * bi_io_vec[0] is always valid if a bio has data.  The check might
   315		 * lead to occasional false negatives when bios are cloned, but compared
   316		 * to the performance impact of cloned bios themselves the loop below
   317		 * doesn't matter anyway.
   318		 */
   319		return lim->chunk_sectors || bio->bi_vcnt != 1 ||
   320			bio->bi_io_vec->bv_len + bio->bi_io_vec->bv_offset > PAGE_SIZE;
   321	}
   322	

-- 
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