Re: [PATCH 2/3] virtio-blk: add uring_cmd support for I/O passthru on chardev.

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

Hi Ferry,

kernel test robot noticed the following build warnings:

[auto build test WARNING on axboe-block/for-next]
[also build test WARNING on linus/master v6.13-rc1 next-20241203]
[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/Ferry-Meng/virtio-blk-add-virtio-blk-chardev-support/20241203-202032
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20241203121424.19887-3-mengferry%40linux.alibaba.com
patch subject: [PATCH 2/3] virtio-blk: add uring_cmd support for I/O passthru on chardev.
config: i386-randconfig-063-20241204 (https://download.01.org/0day-ci/archive/20241204/202412042324.uKQ5KdkE-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241204/202412042324.uKQ5KdkE-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/202412042324.uKQ5KdkE-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/block/virtio_blk.c:144:28: sparse: sparse: restricted __virtio32 degrades to integer
>> drivers/block/virtio_blk.c:1337:53: sparse: sparse: restricted blk_opf_t degrades to integer
>> drivers/block/virtio_blk.c:1337:59: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected restricted blk_opf_t [usertype] opf @@     got unsigned int @@
   drivers/block/virtio_blk.c:1337:59: sparse:     expected restricted blk_opf_t [usertype] opf
   drivers/block/virtio_blk.c:1337:59: sparse:     got unsigned int
>> drivers/block/virtio_blk.c:1405:26: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __virtio64 [assigned] [usertype] sector @@     got restricted __virtio32 @@
   drivers/block/virtio_blk.c:1405:26: sparse:     expected restricted __virtio64 [assigned] [usertype] sector
   drivers/block/virtio_blk.c:1405:26: sparse:     got restricted __virtio32
>> drivers/block/virtio_blk.c:1410:26: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int rq_flags @@     got restricted blk_opf_t [usertype] @@
   drivers/block/virtio_blk.c:1410:26: sparse:     expected unsigned int rq_flags
   drivers/block/virtio_blk.c:1410:26: sparse:     got restricted blk_opf_t [usertype]
>> drivers/block/virtio_blk.c:1414:26: sparse: sparse: invalid assignment: |=
   drivers/block/virtio_blk.c:1414:26: sparse:    left side has type unsigned int
   drivers/block/virtio_blk.c:1414:26: sparse:    right side has type restricted blk_opf_t
   drivers/block/virtio_blk.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/slab.h):
   include/linux/page-flags.h:237:46: sparse: sparse: self-comparison always evaluates to false
   include/linux/page-flags.h:237:46: sparse: sparse: self-comparison always evaluates to false

vim +144 drivers/block/virtio_blk.c

   141	
   142	static bool virtblk_is_write(struct virtblk_command *cmd)
   143	{
 > 144		return cmd->out_hdr.type & VIRTIO_BLK_T_OUT;
   145	}
   146	

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