[stable:linux-6.1.y 1681/6252] arch/arm64/include/asm/pgtable.h:871:44: error: call to undeclared function 'pud_user_exec'; ISO C99 and later do not support implicit function declarations

[kernel test robot <lkp@intel.com>]

Hi Liu,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.1.y
head:   a343b0dd87b42ba9d508fbf7d0c06f744c2e0954
commit: a006aaffd78ff70efcffa44e325633c0840b2bf2 [1681/6252] arm64/mm: add pud_user_exec() check in pud_user_accessible_page()
config: arm64-randconfig-r036-20230530 (https://download.01.org/0day-ci/archive/20230530/202305301536.JbenGcsI-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 4faf3aaf28226a4e950c103a14f6fc1d1fdabb1b)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=a006aaffd78ff70efcffa44e325633c0840b2bf2
        git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
        git fetch --no-tags stable linux-6.1.y
        git checkout a006aaffd78ff70efcffa44e325633c0840b2bf2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm64 prepare

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305301536.JbenGcsI-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/arm64/kernel/asm-offsets.c:12:
   In file included from include/linux/kexec.h:18:
   In file included from include/linux/crash_core.h:6:
   In file included from include/linux/elfcore.h:11:
   In file included from include/linux/ptrace.h:10:
   In file included from include/linux/pid_namespace.h:7:
   In file included from include/linux/mm.h:29:
   In file included from include/linux/pgtable.h:6:
>> arch/arm64/include/asm/pgtable.h:871:44: error: call to undeclared function 'pud_user_exec'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           return pud_leaf(pud) && (pud_user(pud) || pud_user_exec(pud));
                                                     ^
   1 error generated.
   make[2]: *** [scripts/Makefile.build:118: arch/arm64/kernel/asm-offsets.s] Error 1
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:1270: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:231: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/pud_user_exec +871 arch/arm64/include/asm/pgtable.h

   868	
   869	static inline bool pud_user_accessible_page(pud_t pud)
   870	{
 > 871		return pud_leaf(pud) && (pud_user(pud) || pud_user_exec(pud));
   872	}
   873	#endif
   874	

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https://github.com/intel/lkp-tests/wiki