[axboe:io_uring-io-slots 6/18] io_uring/slot.c:189:24: sparse: sparse: incorrect type in assignment (different base types)

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git io_uring-io-slots
head:   1df7c6218b89284dc5234517cc2d0eae158726a2
commit: 692d2c0e4347c8712317a40dbf60e95019c1737d [6/18] io_uring: add IORING_OP_SLOT_RW and wire up slot completion
config: alpha-randconfig-r111-20260618 (https://download.01.org/0day-ci/archive/20260622/202606222147.xHJldm7B-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 10.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260622/202606222147.xHJldm7B-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/202606222147.xHJldm7B-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> io_uring/slot.c:189:24: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned char [usertype] op @@     got restricted blk_opf_t @@
   io_uring/slot.c:189:24: sparse:     expected unsigned char [usertype] op
   io_uring/slot.c:189:24: sparse:     got restricted blk_opf_t
   io_uring/slot.c:191:24: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned char [usertype] op @@     got restricted blk_opf_t @@
   io_uring/slot.c:191:24: sparse:     expected unsigned char [usertype] op
   io_uring/slot.c:191:24: sparse:     got restricted blk_opf_t

vim +189 io_uring/slot.c

   156	
   157	int io_slot_rw_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
   158	{
   159		struct io_slot_rw *rw = io_kiocb_to_cmd(req, struct io_slot_rw);
   160		u32 rw_flags;
   161	
   162		/*
   163		 * Using slot read/write with IOSQE_ASYNC is inefficient and hence a
   164		 * terrible idea, better make that explicit.
   165		 */
   166		if (req->flags & REQ_F_FORCE_ASYNC)
   167			return -EINVAL;
   168	
   169		if (sqe->file_index || sqe->addr3)
   170			return -EINVAL;
   171	
   172		rw_flags = READ_ONCE(sqe->rw_flags);
   173		if (rw_flags & ~IORING_SLOT_RW_WRITE)
   174			return -EINVAL;
   175	
   176		rw->offset = READ_ONCE(sqe->off);
   177		if (rw->offset & ((1ULL << SECTOR_SHIFT) - 1))
   178			return -EINVAL;
   179		rw->buf_off = READ_ONCE(sqe->addr);
   180		if (rw->buf_off & ((1ULL << SECTOR_SHIFT) - 1))
   181			return -EINVAL;
   182	
   183		rw->slot_id = READ_ONCE(sqe->buf_index);
   184		rw->nbytes = READ_ONCE(sqe->len);
   185		if (!rw->nbytes)
   186			return -EINVAL;
   187	
   188		if (rw_flags & IORING_SLOT_RW_WRITE)
 > 189			rw->op = REQ_OP_WRITE;
   190		else
   191			rw->op = REQ_OP_READ;
   192		return 0;
   193	}
   194	

--
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