[linux-next:master 6040/6048] arch/arm64/include/asm/kfence.h:17:2: error: implicit declaration of function 'set_memory_valid'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   59fa6a163ffabc1bf25c5e0e33899e268a96d3cc
commit: ea7ce6b17c1555b62690471f536eba6358ed3125 [6040/6048] set_memory: allow querying whether set_direct_map_*() is actually enabled
config: arm64-randconfig-r024-20210202 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ea7ce6b17c1555b62690471f536eba6358ed3125
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout ea7ce6b17c1555b62690471f536eba6358ed3125
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   In file included from mm/kfence/core.c:26:
   arch/arm64/include/asm/kfence.h: In function 'kfence_protect_page':

quoted

arch/arm64/include/asm/kfence.h:17:2: error: implicit declaration of function 'set_memory_valid' [-Werror=implicit-function-declaration]

      17 |  set_memory_valid(addr, 1, !protect);
         |  ^~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for OCTEONTX2_MBOX
   Depends on NETDEVICES && ETHERNET && NET_VENDOR_MARVELL
   Selected by
   - CRYPTO_DEV_OCTEONTX2_CPT && CRYPTO && CRYPTO_HW && (ARM64 || COMPILE_TEST && PCI_MSI && 64BIT && CRYPTO_LIB_AES


vim +/set_memory_valid +17 arch/arm64/include/asm/kfence.h

b6a4dacdad08f0 Marco Elver 2021-01-22  14  
b6a4dacdad08f0 Marco Elver 2021-01-22  15  static inline bool kfence_protect_page(unsigned long addr, bool protect)
b6a4dacdad08f0 Marco Elver 2021-01-22  16  {
b6a4dacdad08f0 Marco Elver 2021-01-22 @17  	set_memory_valid(addr, 1, !protect);
b6a4dacdad08f0 Marco Elver 2021-01-22  18  
b6a4dacdad08f0 Marco Elver 2021-01-22  19  	return true;
b6a4dacdad08f0 Marco Elver 2021-01-22  20  }
b6a4dacdad08f0 Marco Elver 2021-01-22  21  

:::::: The code at line 17 was first introduced by commit
:::::: b6a4dacdad08f0a7db077346f89b36aa6891cde7 arm64, kfence: enable KFENCE for ARM64

:::::: TO: Marco Elver [off-list ref]
:::::: CC: Stephen Rothwell [off-list ref]

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