linux-kernel - arch/x86/kernel/cpu/sgx/main.c:124: warning: Function parameter or member 'low' not described in 'sgx_calc_section

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Date: Sun, 7 Jan 2024 02:35:04 +0800
From: kernel test robot <lkp@...el.com>
To: Sean Christopherson <sean.j.christopherson@...el.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, Borislav Petkov <bp@...e.de>,
	Serge Ayoun <serge.ayoun@...el.com>,
	Jarkko Sakkinen <jarkko@...nel.org>
Subject: arch/x86/kernel/cpu/sgx/main.c:124: warning: Function parameter or
 member 'low' not described in 'sgx_calc_section_metric'

Hi Sean,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   95c8a35f1c017327eab3b6a2ff5c04255737c856
commit: e7e0545299d8cb0fd6fe3ba50401b7f5c3937362 x86/sgx: Initialize metadata for Enclave Page Cache (EPC) sections
date:   3 years, 2 months ago
config: x86_64-buildonly-randconfig-006-20240105 (https://download.01.org/0day-ci/archive/20240107/202401070210.pQcalZHm-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240107/202401070210.pQcalZHm-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/202401070210.pQcalZHm-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/cpu/sgx/main.c:124: warning: Function parameter or member 'low' not described in 'sgx_calc_section_metric'
>> arch/x86/kernel/cpu/sgx/main.c:124: warning: Function parameter or member 'high' not described in 'sgx_calc_section_metric'
>> arch/x86/kernel/cpu/sgx/main.c:124: warning: expecting prototype for A section metric is concatenated in a way that @low bits 12(). Prototype was for sgx_calc_section_metric() instead


vim +124 arch/x86/kernel/cpu/sgx/main.c

   117	
   118	/**
   119	 * A section metric is concatenated in a way that @low bits 12-31 define the
   120	 * bits 12-31 of the metric and @high bits 0-19 define the bits 32-51 of the
   121	 * metric.
   122	 */
   123	static inline u64 __init sgx_calc_section_metric(u64 low, u64 high)
 > 124	{
   125		return (low & GENMASK_ULL(31, 12)) +
   126		       ((high & GENMASK_ULL(19, 0)) << 32);
   127	}
   128	

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