[android-common:android16-6.12 1/1] drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-kvm.c:252:6: warning: variable 'ret' set but not used

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

Hi Mostafa,

First bad commit (maybe != root cause):

tree:   https://android.googlesource.com/kernel/common android16-6.12
head:   d73a8ddf419e5ee819fff624cf35bfedd85b5609
commit: e0abda8b771ca9dd97fd815b4be3bc9711fa3a5c [1/1] ANDROID: drivers/arm-smmu-v3-kvm: Modularize driver
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20260327/202603270130.EhJPI60i-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260327/202603270130.EhJPI60i-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/202603270130.EhJPI60i-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-kvm.c:252:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
     252 |         int ret;
         |             ^
   1 warning generated.
--
>> drivers/iommu/arm/arm-smmu-v3/pkvm/arm-smmu-v3.c:1360:5: warning: no previous prototype for function 'smmu_init_hyp_module' [-Wmissing-prototypes]
    1360 | int smmu_init_hyp_module(const struct pkvm_module_ops *ops)
         |     ^
   drivers/iommu/arm/arm-smmu-v3/pkvm/arm-smmu-v3.c:1360:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1360 | int smmu_init_hyp_module(const struct pkvm_module_ops *ops)
         | ^
         | static 
   1 warning generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for INTEL_MEI_ME
   Depends on [n]: X86 && PCI [=y]
   Selected by [m]:
   - INTEL_MEI_HDCP [=m] && (DRM_I915 [=n] || DRM_XE [=m])
   - INTEL_MEI_PXP [=m] && (DRM_I915 [=n] || DRM_XE [=m])


vim +/ret +252 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-kvm.c

6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  249  
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  250  static void kvm_arm_smmu_domain_free(struct iommu_domain *domain)
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  251  {
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12 @252  	int ret;
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  253  	struct kvm_arm_smmu_domain *kvm_smmu_domain = to_kvm_smmu_domain(domain);
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  254  	struct arm_smmu_device *smmu = kvm_smmu_domain->smmu;
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  255  
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  256  	if (smmu) {
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  257  		ret = kvm_call_hyp_nvhe(__pkvm_host_iommu_free_domain, kvm_smmu_domain->id);
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  258  		ida_free(&kvm_arm_smmu_domain_ida, kvm_smmu_domain->id);
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  259  	}
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  260  	kfree(kvm_smmu_domain);
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  261  }
6cb3ecc7be2f63 Mostafa Saleh 2024-12-12  262  

:::::: The code at line 252 was first introduced by commit
:::::: 6cb3ecc7be2f6315e496f59b1966a2b515dfc776 BACKPORT: FROMLIST: iommu/arm-smmu-v3-kvm: Add IOMMU ops

:::::: TO: Mostafa Saleh <smostafa@google.com>
:::::: CC: Mostafa Saleh <smostafa@google.com>

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