tree: https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next head: 6c4457c324cd9855352e3eb1f965105901e47a6d commit: e8c07082a810fbb9db303a2b66b66b8d7e588b53 [3/5] Kbuild: move to -std=gnu11 config: arm-randconfig-r011-20220313 (https://download.01.org/0day-ci/archive/20220314/202203141621.9GAoyWx1-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 3e4950d7fa78ac83f33bbf1658e2f49a73719236) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git/commit/?id=e8c07082a810fbb9db303a2b66b66b8d7e588b53 git remote add masahiroy-kbuild https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git git fetch --no-tags masahiroy-kbuild for-next git checkout e8c07082a810fbb9db303a2b66b66b8d7e588b53 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> arch/arm/mm/copypage-v4mc.c:70:3: error: implicit declaration of function '__flush_dcache_page' is invalid in C99 [-Werror,-Wimplicit-function-declaration] __flush_dcache_page(page_mapping_file(from), from); ^ arch/arm/mm/copypage-v4mc.c:70:3: note: did you mean 'flush_dcache_page'? arch/arm/include/asm/cacheflush.h:292:13: note: 'flush_dcache_page' declared here extern void flush_dcache_page(struct page *); ^ >> arch/arm/mm/copypage-v4mc.c:74:2: error: implicit declaration of function 'set_top_pte' is invalid in C99 [-Werror,-Wimplicit-function-declaration] set_top_pte(COPYPAGE_MINICACHE, mk_pte(from, minicache_pgprot)); ^ >> arch/arm/mm/copypage-v4mc.c:74:34: error: implicit declaration of function 'mk_pte' is invalid in C99 [-Werror,-Wimplicit-function-declaration] set_top_pte(COPYPAGE_MINICACHE, mk_pte(from, minicache_pgprot)); ^ arch/arm/mm/copypage-v4mc.c:74:47: error: use of undeclared identifier 'L_PTE_PRESENT' set_top_pte(COPYPAGE_MINICACHE, mk_pte(from, minicache_pgprot)); ^ arch/arm/mm/copypage-v4mc.c:23:35: note: expanded from macro 'minicache_pgprot' #define minicache_pgprot __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | \ ^ arch/arm/mm/copypage-v4mc.c:74:47: error: use of undeclared identifier 'L_PTE_YOUNG' arch/arm/mm/copypage-v4mc.c:23:51: note: expanded from macro 'minicache_pgprot' #define minicache_pgprot __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | \ ^ arch/arm/mm/copypage-v4mc.c:74:47: error: use of undeclared identifier 'L_PTE_MT_MINICACHE' arch/arm/mm/copypage-v4mc.c:24:7: note: expanded from macro 'minicache_pgprot' L_PTE_MT_MINICACHE) ^ arch/arm/mm/copypage-v4mc.c:74:14: error: use of undeclared identifier 'COPYPAGE_MINICACHE' set_top_pte(COPYPAGE_MINICACHE, mk_pte(from, minicache_pgprot)); ^ arch/arm/mm/copypage-v4mc.c:76:28: error: use of undeclared identifier 'COPYPAGE_MINICACHE' mc_copy_user_page((void *)COPYPAGE_MINICACHE, kto); ^ arch/arm/mm/copypage-v4mc.c:64:6: warning: no previous prototype for function 'v4_mc_copy_user_highpage' [-Wmissing-prototypes] void v4_mc_copy_user_highpage(struct page *to, struct page *from, ^ arch/arm/mm/copypage-v4mc.c:64:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void v4_mc_copy_user_highpage(struct page *to, struct page *from, ^ static arch/arm/mm/copypage-v4mc.c:86:6: warning: no previous prototype for function 'v4_mc_clear_user_highpage' [-Wmissing-prototypes] void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr) ^ arch/arm/mm/copypage-v4mc.c:86:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr) ^ static arch/arm/mm/copypage-v4mc.c:109:21: error: variable has incomplete type 'struct cpu_user_fns' struct cpu_user_fns v4_mc_user_fns __initdata = { ^ arch/arm/mm/copypage-v4mc.c:109:8: note: forward declaration of 'struct cpu_user_fns' struct cpu_user_fns v4_mc_user_fns __initdata = { ^ 2 warnings and 9 errors generated. vim +/__flush_dcache_page +70 arch/arm/mm/copypage-v4mc.c d2bab05ac1f9a2 Russell King 2005-05-10 63 7dd8c4f3526b16 Russell King 2009-01-18 64 void v4_mc_copy_user_highpage(struct page *to, struct page *from, f00a75c094c340 Russell King 2009-10-05 65 unsigned long vaddr, struct vm_area_struct *vma) d2bab05ac1f9a2 Russell King 2005-05-10 66 { 5472e862de2bc4 Cong Wang 2011-11-25 67 void *kto = kmap_atomic(to); 1c9d3df5e88ad7 Richard Purdie 2006-12-30 68 c01778001a4f5a Catalin Marinas 2010-09-13 69 if (!test_and_set_bit(PG_dcache_clean, &from->flags)) cb9f753a3731f7 Huang Ying 2018-04-05 @70 __flush_dcache_page(page_mapping_file(from), from); 1c9d3df5e88ad7 Richard Purdie 2006-12-30 71 bd31b85960a7fc Thomas Gleixner 2009-07-03 72 raw_spin_lock(&minicache_lock); d2bab05ac1f9a2 Russell King 2005-05-10 73 67ece1443174d8 Russell King 2011-07-02 @74 set_top_pte(COPYPAGE_MINICACHE, mk_pte(from, minicache_pgprot)); d2bab05ac1f9a2 Russell King 2005-05-10 75 de27c308223dc9 Russell King 2011-07-02 76 mc_copy_user_page((void *)COPYPAGE_MINICACHE, kto); d2bab05ac1f9a2 Russell King 2005-05-10 77 bd31b85960a7fc Thomas Gleixner 2009-07-03 78 raw_spin_unlock(&minicache_lock); 063b0a4207e43a Russell King 2008-10-31 79 5472e862de2bc4 Cong Wang 2011-11-25 80 kunmap_atomic(kto); d2bab05ac1f9a2 Russell King 2005-05-10 81 } d2bab05ac1f9a2 Russell King 2005-05-10 82 :::::: The code at line 70 was first introduced by commit :::::: cb9f753a3731f7fe16447bea45cb6f8e8bb432fb mm: fix races between swapoff and flush dcache :::::: TO: Huang Ying <ying.huang@xxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
