Hi Aneesh,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f40ddce88593482919761f74910f42f4b84c004b
commit: 48a8ab4eeb8271f2a0e2ca3cf80844a59acca153 powerpc/book3s64/pkeys: Don't update SPRN_AMR when in kernel mode.
date:   2 months ago
config: powerpc64-randconfig-r005-20210215 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
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
        # install powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=48a8ab4eeb8271f2a0e2ca3cf80844a59acca153
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 48a8ab4eeb8271f2a0e2ca3cf80844a59acca153
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 

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

All errors (new ones prefixed by >>):

>> arch/powerpc/mm/book3s64/pkeys.c:284:20: error: unused function 'update_current_thread_amr' [-Werror,-Wunused-function]
   static inline void update_current_thread_amr(u64 value)
                      ^
>> arch/powerpc/mm/book3s64/pkeys.c:289:20: error: unused function 'update_current_thread_iamr' [-Werror,-Wunused-function]
   static inline void update_current_thread_iamr(u64 value)
                      ^
   2 errors generated.


vim +/update_current_thread_amr +284 arch/powerpc/mm/book3s64/pkeys.c

   283	
 > 284	static inline void update_current_thread_amr(u64 value)
   285	{
   286		current->thread.regs->amr = value;
   287	}
   288	
 > 289	static inline void update_current_thread_iamr(u64 value)
   290	{
   291		if (!likely(pkey_execute_disable_supported))
   292			return;
   293	
   294		current->thread.regs->iamr = value;
   295	}
   296	

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