[peterz-queue:locking/core 17/21] tools/arch/x86/include/asm/cpufeatures.h:228:68: error: '/*' within block comment

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/core
head:   098a858bcdad1b6327e23274626c9fb36c5932fc
commit: 6cbc4e025e8c31cdc861ad9f2f53dc0eb290d586 [17/21] x86/paravirt: Use static_call() for the paravirt spinlock ops
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260805/202608050236.U2vlcV6b-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260805/202608050236.U2vlcV6b-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/202608050236.U2vlcV6b-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from kernel/bounds.c:14:
   In file included from include/linux/log2.h:12:
   In file included from include/linux/bitops.h:67:
   In file included from arch/x86/include/asm/bitops.h:419:
   In file included from arch/x86/include/asm/arch_hweight.h:5:
>> arch/x86/include/asm/cpufeatures.h:228:68: warning: '/*' within block comment [-Wcomment]
     228 | /* free: was #define X86_FEATURE_PVUNLOCK               ( 8*32+20) /* PV unlock function */
         |                                                                    ^
   1 warning generated.
   In file included from arch/x86/kernel/asm-offsets.c:9:
   In file included from include/linux/crypto.h:15:
   In file included from include/linux/completion.h:12:
   In file included from include/linux/swait.h:7:
   In file included from include/linux/spinlock.h:59:
   In file included from include/linux/irqflags.h:18:
   In file included from arch/x86/include/asm/irqflags.h:9:
   In file included from arch/x86/include/asm/nospec-branch.h:11:
>> arch/x86/include/asm/cpufeatures.h:228:68: warning: '/*' within block comment [-Wcomment]
     228 | /* free: was #define X86_FEATURE_PVUNLOCK               ( 8*32+20) /* PV unlock function */
         |                                                                    ^
   1 warning generated.
   In file included from arch/x86/special.c:7:
>> tools/arch/x86/include/asm/cpufeatures.h:228:68: error: '/*' within block comment [-Werror,-Wcomment]
     228 | /* free: was #define X86_FEATURE_PVUNLOCK               ( 8*32+20) /* PV unlock function */
         |                                                                    ^
   1 error generated.
   make[6]: *** [tools/build/Makefile.build:96: tools/objtool/arch/x86/special.o] Error 1
   In file included from kernel/sched/rq-offsets.c:5:
   In file included from kernel/sched/sched.h:8:
   In file included from include/linux/prandom.h:13:
   In file included from include/linux/percpu.h:5:
   In file included from include/linux/alloc_tag.h:13:
   In file included from include/linux/cpumask.h:10:
   In file included from include/linux/atomic.h:7:
   In file included from arch/x86/include/asm/atomic.h:8:
   In file included from arch/x86/include/asm/cmpxchg.h:6:
>> arch/x86/include/asm/cpufeatures.h:228:68: warning: '/*' within block comment [-Wcomment]
     228 | /* free: was #define X86_FEATURE_PVUNLOCK               ( 8*32+20) /* PV unlock function */
         |                                                                    ^
   make[6]: Target '__build' not remade because of errors.
   make[5]: *** [tools/build/Makefile.build:158: arch/x86] Error 2
   1 warning generated.
   make[5]: Target '__build' not remade because of errors.
   make[4]: *** [Makefile:123: tools/objtool/objtool-in.o] Error 2
   make[4]: Target 'all' not remade because of errors.
   make[3]: *** [Makefile:74: objtool] Error 2
   make[2]: *** [Makefile:1587: tools/objtool] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +228 tools/arch/x86/include/asm/cpufeatures.h

   222	
   223	#define X86_FEATURE_VMMCALL		( 8*32+15) /* "vmmcall" Prefer VMMCALL to VMCALL */
   224	#define X86_FEATURE_XENPV		( 8*32+16) /* Xen paravirtual guest */
   225	#define X86_FEATURE_EPT_AD		( 8*32+17) /* "ept_ad" Intel Extended Page Table access-dirty bit */
   226	#define X86_FEATURE_VMCALL		( 8*32+18) /* Hypervisor supports the VMCALL instruction */
   227	#define X86_FEATURE_VMW_VMMCALL		( 8*32+19) /* VMware prefers VMMCALL hypercall instruction */
 > 228	/* free: was #define X86_FEATURE_PVUNLOCK               ( 8*32+20) /* PV unlock function */
   229	#define X86_FEATURE_VCPUPREEMPT		( 8*32+21) /* PV vcpu_is_preempted function */
   230	#define X86_FEATURE_TDX_GUEST		( 8*32+22) /* "tdx_guest" Intel Trust Domain Extensions Guest */
   231	

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