[dwmw2:cpuid 4/4] arch/x86/kernel/kvm.c:899:30: error: a function declaration without a prototype is deprecated in all versions of C

[dwmw2:cpuid 4/4] arch/x86/kernel/kvm.c:899:30: error: a function declaration without a prototype is deprecated in all versions of C

[kernel test robot]

tree:   git://git.infradead.org/users/dwmw2/linux cpuid
head:   7a7b1aa66380243dddb2037ff113bb2265b529ff
commit: 73038303178dd4d4f847ffe024b87b4a2a0930a5 [4/4] x86/kvm: Obtain TSC frequency from CPUID if present
config: x86_64-buildonly-randconfig-002-20250814 (https://download.01.org/0day-ci/archive/20250814/202508140537.ByBMF2YF-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/20250814/202508140537.ByBMF2YF-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/202508140537.ByBMF2YF-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/x86/kernel/kvm.c:899:30: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
     899 | unsigned int kvm_para_tsc_khz()
         |                              ^
         |                               void
   1 error generated.


vim +899 arch/x86/kernel/kvm.c

   898	
 > 899	unsigned int kvm_para_tsc_khz()
   900	{
   901		u32 base = kvm_cpuid_base();
   902	
   903		if (cpuid_eax(base) >= (base | KVM_CPUID_TIMING_INFO))
   904			return cpuid_eax(base | KVM_CPUID_TIMING_INFO);
   905	
   906		return 0;
   907	}
   908	

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