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

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Message-ID: <522f1bc2-417f-434a-92f9-7b417744cef4@linux.microsoft.com>
Date: Mon, 17 Nov 2025 09:41:19 -0800
From: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
To: Wei Liu <wei.liu@...nel.org>, kernel test robot <lkp@...el.com>
Cc: Anirudh Rayabharam <anirudh@...rudhrb.com>,
 "K. Y. Srinivasan" <kys@...rosoft.com>,
 Haiyang Zhang <haiyangz@...rosoft.com>, Dexuan Cui <decui@...rosoft.com>,
 Long Li <longli@...rosoft.com>, llvm@...ts.linux.dev,
 oe-kbuild-all@...ts.linux.dev, linux-hyperv@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Drivers: hv: ioctl for self targeted passthrough hvcalls

On 11/17/2025 9:34 AM, Wei Liu wrote:
> +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@intel.com/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@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@...el.com>
>> | Closes: https://lore.kernel.org/oe-kbuild-all/202511161617.KcDzR4sA-lkp@intel.com/
>>
>> 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.
> 
This is introduced in hyperv-next, in:
59aeea195948 mshv: Add the HVCALL_GET_PARTITION_PROPERTY_EX hypercall

But the bot applies the patch to linus/master, that is probably why.

>>>> 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.
> 

I think this is just due to the earlier error...

Nuno

> Wei