Re: [PATCH] Drivers: hv: ioctl for self targeted passthrough hvcalls

[Wei Liu]

+Nuno

On Sun, Nov 16, 2025 at 04:17:08PM +0800, kernel test robot wrote:
> Hi Anirudh,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on linus/master]
> [also build test ERROR on v6.18-rc5]
> [cannot apply to next-20251114]
> [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/Anirudh-Rayabharam/Drivers-hv-ioctl-for-self-targeted-passthrough-hvcalls/20251114-182039
> base:   linus/master
> patch link:    https://lore.kernel.org/r/20251114095853.3482596-1-anirudh%40anirudhrb.com
> patch subject: [PATCH] Drivers: hv: ioctl for self targeted passthrough hvcalls
> config: x86_64-buildonly-randconfig-005-20251116 (https://download.01.org/0day-ci/archive/20251116/202511161617.KcDzR4sA-lkp@xxxxxxxxx/config)
> compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251116/202511161617.KcDzR4sA-lkp@xxxxxxxxx/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@xxxxxxxxx>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202511161617.KcDzR4sA-lkp@xxxxxxxxx/
> 
> All errors (new ones prefixed by >>):
> 
> >> drivers/hv/mshv_root_main.c:125:2: error: use of undeclared identifier 'HVCALL_GET_PARTITION_PROPERTY_EX'
>      125 |         HVCALL_GET_PARTITION_PROPERTY_EX,
>          |         ^

Anirudh, please check this.

> >> drivers/hv/mshv_root_main.c:175:18: error: invalid application of 'sizeof' to an incomplete type 'u16[]' (aka 'unsigned short[]')
>      175 |         for (i = 0; i < ARRAY_SIZE(mshv_passthru_hvcalls); ++i)
>          |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This is from the original patch. Perhaps adding the explicit declaration
of the array size would help.

Wei