[hch-misc:block-error-injection 3/4] block/blk-core.c:141:33: sparse: sparse: cast to restricted blk_opf_t

[hch-misc:block-error-injection 3/4] block/blk-core.c:141:33: sparse: sparse: cast to restricted blk_opf_t

[kernel test robot]

tree:   git://git.infradead.org/users/hch/misc.git block-error-injection
head:   5976bb2f6894c34ac87cd38acf150423724c4628
commit: 7979d56135777d83ac77af6854484aa7a4c8c871 [3/4] block: add a str_to_blk_op helper
config: microblaze-randconfig-r113-20260610 (https://download.01.org/0day-ci/archive/20260610/202606101953.PdmBi8go-lkp@intel.com/config)
compiler: microblaze-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/20260610/202606101953.PdmBi8go-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/202606101953.PdmBi8go-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> block/blk-core.c:141:33: sparse: sparse: cast to restricted blk_opf_t

vim +141 block/blk-core.c

   134	
   135	enum req_op str_to_blk_op(const char *op)
   136	{
   137		int i;
   138	
   139		for (i = 0; i < ARRAY_SIZE(blk_op_name); i++)
   140			if (blk_op_name[i] && !strcmp(blk_op_name[i], op))
 > 141				return (enum req_op)i;
   142		return REQ_OP_LAST;
   143	}
   144	

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [hch-misc:block-error-injection 3/4] block/blk-core.c:141:33: sparse: sparse: cast to restricted blk_opf_t

[Christoph Hellwig]

On Wed, Jun 10, 2026 at 07:22:03PM +0800, kernel test robot wrote:
>    139		for (i = 0; i < ARRAY_SIZE(blk_op_name); i++)
>    140			if (blk_op_name[i] && !strcmp(blk_op_name[i], op))
>  > 141				return (enum req_op)i;

My spare on x86 and varous cross builds is perfectly fine with it.
What sparese version is installed on the microblaze build box?

Re: [hch-misc:block-error-injection 3/4] block/blk-core.c:141:33: sparse: sparse: cast to restricted blk_opf_t

[Philip Li]

On Wed, Jun 10, 2026 at 01:37:57PM +0200, Christoph Hellwig wrote:
> On Wed, Jun 10, 2026 at 07:22:03PM +0800, kernel test robot wrote:
> >    139		for (i = 0; i < ARRAY_SIZE(blk_op_name); i++)
> >    140			if (blk_op_name[i] && !strcmp(blk_op_name[i], op))
> >  > 141				return (enum req_op)i;
> 
> My spare on x86 and varous cross builds is perfectly fine with it.
> What sparese version is installed on the microblaze build box?

The version used is

  sparse: v0.6.5-rc1

Thanks

> 

Re: [hch-misc:block-error-injection 3/4] block/blk-core.c:141:33: sparse: sparse: cast to restricted blk_opf_t

[Christoph Hellwig]

On Wed, Jun 10, 2026 at 07:57:35PM +0800, Philip Li wrote:
> On Wed, Jun 10, 2026 at 01:37:57PM +0200, Christoph Hellwig wrote:
> > On Wed, Jun 10, 2026 at 07:22:03PM +0800, kernel test robot wrote:
> > >    139		for (i = 0; i < ARRAY_SIZE(blk_op_name); i++)
> > >    140			if (blk_op_name[i] && !strcmp(blk_op_name[i], op))
> > >  > 141				return (enum req_op)i;
> > 
> > My spare on x86 and varous cross builds is perfectly fine with it.
> > What sparese version is installed on the microblaze build box?
> 
> The version used is
> 
>   sparse: v0.6.5-rc1

That's pretty current.  No idea why this generates a warning on
microblaze, but not elsewhere.