tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4176cf5c5651c33769de83bb61b0287f4ec7719f commit: a6c37165ca40e362ec07d768ec418afb3c29e4ed [3078/3764] mempolicy.h: remove unnecessary header file inclusions with no test failure config: arm64-randconfig-004-20241216 (https://download.01.org/0day-ci/archive/20241216/202412160820.Zivm9VbY-lkp@xxxxxxxxx/config) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241216/202412160820.Zivm9VbY-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202412160820.Zivm9VbY-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> mm/z3fold.c:353:3: error: call to undeclared function 'lock_page'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] lock_page(page); ^ mm/z3fold.c:353:3: note: did you mean 'copy_page'? arch/arm64/include/asm/page.h:22:13: note: 'copy_page' declared here extern void copy_page(void *to, const void *from); ^ >> mm/z3fold.c:355:3: error: call to undeclared function 'unlock_page'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] unlock_page(page); ^ mm/z3fold.c:1052:3: error: call to undeclared function 'lock_page'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] lock_page(page); ^ mm/z3fold.c:1054:3: error: call to undeclared function 'unlock_page'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] unlock_page(page); ^ >> mm/z3fold.c:1056:12: error: call to undeclared function 'trylock_page'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] WARN_ON(!trylock_page(page)); ^ mm/z3fold.c:1056:12: note: did you mean 'try_get_page'? include/linux/mm.h:1527:33: note: 'try_get_page' declared here static inline __must_check bool try_get_page(struct page *page) ^ mm/z3fold.c:1058:3: error: call to undeclared function 'unlock_page'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] unlock_page(page); ^ 6 errors generated. vim +/lock_page +353 mm/z3fold.c 9a001fc19cccde Vitaly Wool 2016-05-20 348 9a001fc19cccde Vitaly Wool 2016-05-20 349 /* Resets the struct page fields and frees the page */ 1f862989b04ade Vitaly Wool 2019-05-13 350 static void free_z3fold_page(struct page *page, bool headless) 9a001fc19cccde Vitaly Wool 2016-05-20 351 { 1f862989b04ade Vitaly Wool 2019-05-13 352 if (!headless) { 1f862989b04ade Vitaly Wool 2019-05-13 @353 lock_page(page); 1f862989b04ade Vitaly Wool 2019-05-13 354 __ClearPageMovable(page); 1f862989b04ade Vitaly Wool 2019-05-13 @355 unlock_page(page); 1f862989b04ade Vitaly Wool 2019-05-13 356 } 5a27aa8220290b Vitaly Wool 2017-02-24 357 __free_page(page); 5a27aa8220290b Vitaly Wool 2017-02-24 358 } 5a27aa8220290b Vitaly Wool 2017-02-24 359 :::::: The code at line 353 was first introduced by commit :::::: 1f862989b04ade61d3aab49184c50e9957f84c7d mm/z3fold.c: support page migration :::::: TO: Vitaly Wool <vitalywool@xxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
