block/blk-mq.c:1063:9: sparse: sparse: cast from restricted req_flags_t

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bfc484fe6abba4b89ec9330e0e68778e2a9856b2
commit: 128459062bc994355027e190477c432ec5b5638a block: cache rq_flags inside blk_mq_rq_ctx_init()
date:   2 weeks ago
config: mips-randconfig-s031-20211101 (attached as .config)
compiler: mips64-linux-gcc (GCC) 11.2.0
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-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=128459062bc994355027e190477c432ec5b5638a
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 128459062bc994355027e190477c432ec5b5638a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=mips SHELL=/bin/bash

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


sparse warnings: (new ones prefixed by >>)
   command-line: note: in included file:
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
   builtin:0:0: sparse: this was the original definition
   block/blk-mq.c:324:26: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int rq_flags @@     got restricted req_flags_t [usertype] @@
   block/blk-mq.c:324:26: sparse:     expected unsigned int rq_flags
   block/blk-mq.c:324:26: sparse:     got restricted req_flags_t [usertype]
   block/blk-mq.c:333:26: sparse: sparse: invalid assignment: |=
   block/blk-mq.c:333:26: sparse:    left side has type unsigned int
   block/blk-mq.c:333:26: sparse:    right side has type restricted req_flags_t
   block/blk-mq.c:335:26: sparse: sparse: invalid assignment: |=
   block/blk-mq.c:335:26: sparse:    left side has type unsigned int
   block/blk-mq.c:335:26: sparse:    right side has type restricted req_flags_t
   block/blk-mq.c:336:22: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted req_flags_t [usertype] rq_flags @@     got unsigned int rq_flags @@
   block/blk-mq.c:336:22: sparse:     expected restricted req_flags_t [usertype] rq_flags
   block/blk-mq.c:336:22: sparse:     got unsigned int rq_flags
>> block/blk-mq.c:1063:9: sparse: sparse: cast from restricted req_flags_t

vim +1063 block/blk-mq.c

6fca6a611c27f1 Christoph Hellwig 2014-05-28  1052  
2b053aca76b48e Bart Van Assche   2016-10-28  1053  void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
2b053aca76b48e Bart Van Assche   2016-10-28  1054  				bool kick_requeue_list)
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1055  {
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1056  	struct request_queue *q = rq->q;
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1057  	unsigned long flags;
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1058  
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1059  	/*
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1060  	 * We abuse this flag that is otherwise used by the I/O scheduler to
ff821d271415f1 Jens Axboe        2017-11-10  1061  	 * request head insertion from the workqueue.
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1062  	 */
e806402130c9c4 Christoph Hellwig 2016-10-20 @1063  	BUG_ON(rq->rq_flags & RQF_SOFTBARRIER);
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1064  
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1065  	spin_lock_irqsave(&q->requeue_lock, flags);
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1066  	if (at_head) {
e806402130c9c4 Christoph Hellwig 2016-10-20  1067  		rq->rq_flags |= RQF_SOFTBARRIER;
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1068  		list_add(&rq->queuelist, &q->requeue_list);
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1069  	} else {
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1070  		list_add_tail(&rq->queuelist, &q->requeue_list);
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1071  	}
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1072  	spin_unlock_irqrestore(&q->requeue_lock, flags);
2b053aca76b48e Bart Van Assche   2016-10-28  1073  
2b053aca76b48e Bart Van Assche   2016-10-28  1074  	if (kick_requeue_list)
2b053aca76b48e Bart Van Assche   2016-10-28  1075  		blk_mq_kick_requeue_list(q);
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1076  }
6fca6a611c27f1 Christoph Hellwig 2014-05-28  1077  

:::::: The code at line 1063 was first introduced by commit
:::::: e806402130c9c494e22c73ae9ead4e79d2a5811c block: split out request-only flags into a new namespace

:::::: TO: Christoph Hellwig <hch@xxxxxx>
:::::: CC: Jens Axboe <axboe@xxxxxx>

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

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