Re: [PATCH v6 2/3] x86/cpu: Check if feature string is non-zero

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

Hi Maciej,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/x86/core]
[also build test WARNING on tip/smp/core v6.19]
[cannot apply to peterz-queue/sched/core linus/master next-20260220]
[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/Maciej-Wieczor-Retman/x86-cpu-Clear-feature-bits-disabled-at-compile-time/20260220-204916
base:   tip/x86/core
patch link:    https://lore.kernel.org/r/bc0eebc8310acfae28a73e3780a67d721c739b89.1771590895.git.m.wieczorretman%40pm.me
patch subject: [PATCH v6 2/3] x86/cpu: Check if feature string is non-zero
config: x86_64-randconfig-r051-20260221 (https://download.01.org/0day-ci/archive/20260221/202602210429.MpUz6J91-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)

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/202602210429.MpUz6J91-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> arch/x86/kernel/cpu/common.c:1987:15-21: ERROR: application of sizeof to pointer

vim +1987 arch/x86/kernel/cpu/common.c

  1973	
  1974	const char *x86_cap_name(unsigned int bit, char *buf)
  1975	{
  1976		unsigned int word = bit >> 5;
  1977		const char *name = NULL;
  1978	
  1979		if (likely(word < NCAPINTS))
  1980			name = x86_cap_flags[bit];
  1981		else if (likely(word < NCAPINTS + NBUGINTS))
  1982			name = x86_bug_flags[bit - 32 * NCAPINTS];
  1983	
  1984		if (name)
  1985			return name;
  1986	
> 1987		snprintf(buf, sizeof(buf), "%u:%u", word, bit & 31);
  1988		return buf;
  1989	}
  1990	

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