linux-kernel - Re: [PATCH v2 18/29] x86/cacheinfo: Use enums for cache descriptor types

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Message-ID: <202503192150.Vhannmnp-lkp@intel.com>
Date: Wed, 19 Mar 2025 22:11:44 +0800
From: kernel test robot <lkp@...el.com>
To: "Ahmed S. Darwish" <darwi@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Borislav Petkov <bp@...en8.de>
Cc: oe-kbuild-all@...ts.linux.dev, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	John Ogness <john.ogness@...utronix.de>, x86@...nel.org,
	x86-cpuid@...ts.linux.dev, LKML <linux-kernel@...r.kernel.org>,
	"Ahmed S. Darwish" <darwi@...utronix.de>
Subject: Re: [PATCH v2 18/29] x86/cacheinfo: Use enums for cache descriptor
 types

Hi Ahmed,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 6d536cad0d55e71442b6d65500f74eb85544269e]

url:    https://github.com/intel-lab-lkp/linux/commits/Ahmed-S-Darwish/x86-treewide-Introduce-x86_vendor_amd_or_hygon/20250318-011153
base:   6d536cad0d55e71442b6d65500f74eb85544269e
patch link:    https://lore.kernel.org/r/20250317164745.4754-19-darwi%40linutronix.de
patch subject: [PATCH v2 18/29] x86/cacheinfo: Use enums for cache descriptor types
config: i386-randconfig-061-20250319 (https://download.01.org/0day-ci/archive/20250319/202503192150.Vhannmnp-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250319/202503192150.Vhannmnp-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503192150.Vhannmnp-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/cpuidle/poll_state.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"
--
   drivers/cpuidle/cpuidle-haltpoll.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"
--
   drivers/cpuidle/sysfs.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"
--
   drivers/cpuidle/governor.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"
--
   drivers/cpuidle/driver.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"
--
   drivers/cpuidle/cpuidle.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"
--
   drivers/cpuidle/governors/menu.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"
--
   drivers/cpuidle/governors/haltpoll.c: note: in included file (through arch/x86/include/asm/cpuid/api.h, arch/x86/include/asm/cpuid.h, arch/x86/include/asm/processor.h, ...):
>> arch/x86/include/asm/cpuid/types.h:56:1: sparse: sparse: static assertion failed: "sizeof(enum _cache_table_type) == 1"

vim +56 arch/x86/include/asm/cpuid/types.h

    45	
    46	/*
    47	 * Leaf 0x2 1-byte descriptors' cache types
    48	 * To be used for their mappings at cache_table[]
    49	 */
    50	enum _cache_table_type {
    51		CACHE_L1_INST,
    52		CACHE_L1_DATA,
    53		CACHE_L2,
    54		CACHE_L3
    55	} __packed;
  > 56	static_assert(sizeof(enum _cache_table_type) == 1);
    57	

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