linux-kernel - [intel-tdx:guest-upstream 25/33] arch/x86/mm/mem_encrypt.c:69:13: warning: no previous prototype for function 'mem_encrypt

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Message-ID: <202201091704.eZKOuCWs-lkp@intel.com>
Date:   Sun, 9 Jan 2022 17:15:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>
Subject: [intel-tdx:guest-upstream 25/33] arch/x86/mm/mem_encrypt.c:69:13:
 warning: no previous prototype for function 'mem_encrypt_init'

tree:   https://github.com/intel/tdx.git guest-upstream
head:   ce71b1628ffd76a06c99780f94767aad8e44305e
commit: 6cff98f39a336faa10ace47660265207d2f7a605 [25/33] x86/mm/cpa: Add support for TDX shared memory
config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20220109/202201091704.eZKOuCWs-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f3a344d2125fa37e59bae1b0874442c650a19607)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel/tdx/commit/6cff98f39a336faa10ace47660265207d2f7a605
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest-upstream
        git checkout 6cff98f39a336faa10ace47660265207d2f7a605
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/mm/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/x86/mm/mem_encrypt.c:69:13: warning: no previous prototype for function 'mem_encrypt_init' [-Wmissing-prototypes]
   void __init mem_encrypt_init(void)
               ^
   arch/x86/mm/mem_encrypt.c:69:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init mem_encrypt_init(void)
   ^
   static 
   1 warning generated.


vim +/mem_encrypt_init +69 arch/x86/mm/mem_encrypt.c

c329da7c594493 Kirill A. Shutemov 2020-03-18  67  
c329da7c594493 Kirill A. Shutemov 2020-03-18  68  /* Architecture __weak replacement functions */
c329da7c594493 Kirill A. Shutemov 2020-03-18 @69  void __init mem_encrypt_init(void)
c329da7c594493 Kirill A. Shutemov 2020-03-18  70  {
c329da7c594493 Kirill A. Shutemov 2020-03-18  71  	if (!cc_platform_has(CC_ATTR_MEM_ENCRYPT))
c329da7c594493 Kirill A. Shutemov 2020-03-18  72  		return;
c329da7c594493 Kirill A. Shutemov 2020-03-18  73  
c329da7c594493 Kirill A. Shutemov 2020-03-18  74  	/* Call into SWIOTLB to update the SWIOTLB DMA buffers */
c329da7c594493 Kirill A. Shutemov 2020-03-18  75  	swiotlb_update_mem_attributes();
c329da7c594493 Kirill A. Shutemov 2020-03-18  76  
c329da7c594493 Kirill A. Shutemov 2020-03-18  77  	print_mem_encrypt_feature_info();
c329da7c594493 Kirill A. Shutemov 2020-03-18  78  }
c329da7c594493 Kirill A. Shutemov 2020-03-18  79  

:::::: The code at line 69 was first introduced by commit
:::::: c329da7c594493b04b3edf8941dca27fedb214c7 x86: Move common memory encryption code to mem_encrypt.c

:::::: TO: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
:::::: CC: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org