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Subject[intel-tdx:guest-upstream 29/37] arch/x86/mm/mem_encrypt.c:96:13: warning: no previous prototype for 'mem_encrypt_init'
tree:   https://github.com/intel/tdx.git guest-upstream
head: 6d174fafe2becc43fd3eaebd3112a5a271b82ded
commit: 3a38521c8205c1c951e57551558dbfec739516cd [29/37] x86/tdx: Make pages shared in ioremap()
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://github.com/intel/tdx/commit/3a38521c8205c1c951e57551558dbfec739516cd
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx guest-upstream
git checkout 3a38521c8205c1c951e57551558dbfec739516cd
# save the attached .config to linux build tree
make W=1 ARCH=x86_64

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

All warnings (new ones prefixed by >>):

>> arch/x86/mm/mem_encrypt.c:96:13: warning: no previous prototype for 'mem_encrypt_init' [-Wmissing-prototypes]
96 | void __init mem_encrypt_init(void)
| ^~~~~~~~~~~~~~~~


vim +/mem_encrypt_init +96 arch/x86/mm/mem_encrypt.c

446571d51af2609 Kirill A. Shutemov 2020-03-18 94
446571d51af2609 Kirill A. Shutemov 2020-03-18 95 /* Architecture __weak replacement functions */
446571d51af2609 Kirill A. Shutemov 2020-03-18 @96 void __init mem_encrypt_init(void)
446571d51af2609 Kirill A. Shutemov 2020-03-18 97 {
446571d51af2609 Kirill A. Shutemov 2020-03-18 98 if (!sme_me_mask)
446571d51af2609 Kirill A. Shutemov 2020-03-18 99 return;
446571d51af2609 Kirill A. Shutemov 2020-03-18 100
446571d51af2609 Kirill A. Shutemov 2020-03-18 101 /* Call into SWIOTLB to update the SWIOTLB DMA buffers */
446571d51af2609 Kirill A. Shutemov 2020-03-18 102 swiotlb_update_mem_attributes();
446571d51af2609 Kirill A. Shutemov 2020-03-18 103
446571d51af2609 Kirill A. Shutemov 2020-03-18 104 print_amd_mem_encrypt_feature_info();
446571d51af2609 Kirill A. Shutemov 2020-03-18 105 }
446571d51af2609 Kirill A. Shutemov 2020-03-18 106

:::::: The code at line 96 was first introduced by commit
:::::: 446571d51af2609e66067b08442c89c5afd07843 x86: Move common memory encryption code to mem_encrypt.c

:::::: TO: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
:::::: CC: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

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