Re: [PATCH hyperv-next v5 01/11] arm64: kvm, smccc: Introduce and use API for detectting hypervisor presence

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

Hi Roman,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 3a7f7785eae7cf012af128ca9e383c91e4955354]

url:    https://github.com/intel-lab-lkp/linux/commits/Roman-Kisel/arm64-kvm-smccc-Introduce-and-use-API-for-detectting-hypervisor-presence/20250308-060639
base:   3a7f7785eae7cf012af128ca9e383c91e4955354
patch link:    https://lore.kernel.org/r/20250307220304.247725-2-romank%40linux.microsoft.com
patch subject: [PATCH hyperv-next v5 01/11] arm64: kvm, smccc: Introduce and use API for detectting hypervisor presence
config: arm64-randconfig-r131-20250312 (https://download.01.org/0day-ci/archive/20250312/202503122113.trcjnau3-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250312/202503122113.trcjnau3-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/202503122113.trcjnau3-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/firmware/smccc/smccc.c:19:21: sparse: sparse: symbol 'smccc_soc_id_version' was not declared. Should it be static?
   drivers/firmware/smccc/smccc.c:20:21: sparse: sparse: symbol 'smccc_soc_id_revision' was not declared. Should it be static?
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer
>> drivers/firmware/smccc/smccc.c:81:37: sparse: sparse: restricted __le32 degrades to integer

vim +81 drivers/firmware/smccc/smccc.c

    69	
    70	bool arm_smccc_hyp_present(const uuid_t *hyp_uuid)
    71	{
    72		struct arm_smccc_res res = {};
    73	
    74		if (arm_smccc_1_1_get_conduit() != SMCCC_CONDUIT_HVC)
    75			return false;
    76		arm_smccc_1_1_hvc(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res);
    77		if (res.a0 == SMCCC_RET_NOT_SUPPORTED)
    78			return false;
    79	
    80		return ({
  > 81			const uuid_t uuid = SMCCC_RES_TO_UUID(res.a0, res.a1, res.a2, res.a3);
    82			const bool present = uuid_equal(&uuid, hyp_uuid);
    83	
    84			present;
    85		});
    86	}
    87	EXPORT_SYMBOL_GPL(arm_smccc_hyp_present);
    88	

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