tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 08bf1a27c4c354b853fd81a79e953525bbcc8506 commit: 925ac141d106b55acbe112a9272f970631a3c082 powerpc/mm: Allocate static page tables for fixmap date: 3 weeks ago :::::: branch date: 49 minutes ago :::::: commit date: 3 weeks ago config: powerpc64-randconfig-r011-20200614 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project c669a1ed6386d57a75a602b53266466dae1e1d84) 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 git checkout 925ac141d106b55acbe112a9272f970631a3c082 # 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(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from arch/powerpc/mm/pgtable_32.c:20: In file included from include/linux/mm.h:95: In file included from arch/powerpc/include/asm/pgtable.h:20: In file included from arch/powerpc/include/asm/nohash/pgtable.h:8: In file included from arch/powerpc/include/asm/nohash/32/pgtable.h:77: arch/powerpc/include/asm/fixmap.h:57:2: warning: overflow in enumeration value FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */ ^ In file included from arch/powerpc/mm/pgtable_32.c:20: In file included from include/linux/mm.h:95: In file included from arch/powerpc/include/asm/pgtable.h:20: In file included from arch/powerpc/include/asm/nohash/pgtable.h:8: In file included from arch/powerpc/include/asm/nohash/32/pgtable.h:77: In file included from arch/powerpc/include/asm/fixmap.h:96: include/asm-generic/fixmap.h:32:19: warning: result of comparison of constant '__end_of_fixed_addresses' (4294967376) with expression of type 'const unsigned int' is always false [-Wtautological-constant-out-of-range-compare] BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:50:19: note: expanded from macro 'BUILD_BUG_ON' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~ include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~ include/linux/compiler.h:350:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler.h:338:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler.h:330:9: note: expanded from macro '__compiletime_assert' if (!(condition)) ^~~~~~~~~ In file included from arch/powerpc/mm/pgtable_32.c:20: In file included from include/linux/mm.h:95: In file included from arch/powerpc/include/asm/pgtable.h:20: In file included from arch/powerpc/include/asm/nohash/pgtable.h:8: In file included from arch/powerpc/include/asm/nohash/32/pgtable.h:77: In file included from arch/powerpc/include/asm/fixmap.h:96: include/asm-generic/fixmap.h:38:39: warning: result of comparison of constant 18445618177942224896 with expression of type 'const unsigned long' is always true [-Wtautological-constant-out-of-range-compare] BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ arch/powerpc/include/asm/bug.h:73:27: note: expanded from macro 'BUG_ON' if (__builtin_constant_p(x)) { ^ In file included from arch/powerpc/mm/pgtable_32.c:20: In file included from include/linux/mm.h:95: In file included from arch/powerpc/include/asm/pgtable.h:20: In file included from arch/powerpc/include/asm/nohash/pgtable.h:8: In file included from arch/powerpc/include/asm/nohash/32/pgtable.h:77: In file included from arch/powerpc/include/asm/fixmap.h:96: include/asm-generic/fixmap.h:38:39: warning: result of comparison of constant 18445618177942224896 with expression of type 'const unsigned long' is always true [-Wtautological-constant-out-of-range-compare] BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ arch/powerpc/include/asm/bug.h:74:7: note: expanded from macro 'BUG_ON' if (x) ^ static u8 early_fixmap_pagetable[FIXMAP_PTE_SIZE] __page_aligned_data; ^~~~~~~~~~~~~~~ arch/powerpc/include/asm/fixmap.h:91:25: note: expanded from macro 'FIXMAP_PTE_SIZE' #define FIXMAP_PTE_SIZE (FIXMAP_ALIGNED_SIZE / PGDIR_SIZE * PTE_TABLE_SIZE) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ unsigned long addr = ALIGN_DOWN(FIXADDR_START, PGDIR_SIZE); ~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:34:26: note: expanded from macro 'ALIGN_DOWN' #define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/uapi/linux/kernel.h:10:31: note: expanded from macro '__ALIGN_KERNEL' #define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/uapi/linux/kernel.h:11:54: note: expanded from macro '__ALIGN_KERNEL_MASK' #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) ~~~~~~~~~~~~~~~^~~~~~~~~ 5 warnings and 1 error generated. # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git remote update linus git checkout 925ac141d106b55acbe112a9272f970631a3c082 vim +38 arch/powerpc/mm/pgtable_32.c 14cf11af6cf608 arch/powerpc/mm/pgtable.c Paul Mackerras 2005-09-26 37 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 @38 static u8 early_fixmap_pagetable[FIXMAP_PTE_SIZE] __page_aligned_data; 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 39 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 40 notrace void __init early_ioremap_init(void) 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 41 { 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 @42 unsigned long addr = ALIGN_DOWN(FIXADDR_START, PGDIR_SIZE); 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 43 pte_t *ptep = (pte_t *)early_fixmap_pagetable; 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 44 pmd_t *pmdp = pmd_ptr_k(addr); 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 45 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 46 for (; (s32)(FIXADDR_TOP - addr) > 0; 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 47 addr += PGDIR_SIZE, ptep += PTRS_PER_PTE, pmdp++) 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 48 pmd_populate_kernel(&init_mm, pmdp, ptep); 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 49 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 50 early_ioremap_setup(); 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 51 } 925ac141d106b5 arch/powerpc/mm/pgtable_32.c Christophe Leroy 2020-05-19 52 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org _______________________________________________ kbuild mailing list -- kbuild(a)lists.01.org To unsubscribe send an email to kbuild-leave(a)lists.01.org