From: kernel test robot <lkp@intel.com>
To: Masahiro Yamada <masahiroy@kernel.org>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
linux-kernel@vger.kernel.org,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>
Subject: arch/x86/include/asm/pgtable_32.h:68:5: warning: 'PTRS_PER_PMD' is not defined, evaluates to 0
Date: Mon, 28 Aug 2023 23:56:09 +0800 [thread overview]
Message-ID: <202308282335.fH9YoGYl-lkp@intel.com> (raw)
Hi Masahiro,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 2dde18cd1d8fac735875f2e4987f11817cc0bc2c
commit: 80b6093b55e31c2c40ff082fb32523d4e852954f kbuild: add -Wundef to KBUILD_CPPFLAGS for W=1 builds
date: 9 months ago
config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20230828/202308282335.fH9YoGYl-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230828/202308282335.fH9YoGYl-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308282335.fH9YoGYl-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from arch/x86/kernel/head_32.S:29:
>> arch/x86/include/asm/pgtable_32.h:68:5: warning: 'PTRS_PER_PMD' is not defined, evaluates to 0 [-Wundef]
#if PTRS_PER_PMD > 1
^
1 warning generated.
vim +/PTRS_PER_PMD +68 arch/x86/include/asm/pgtable_32.h
^1da177e4c3f41 include/asm-i386/pgtable.h Linus Torvalds 2005-04-16 58
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 59 /*
ea3186b9572a1b arch/x86/include/asm/pgtable_32.h Arvind Sankar 2020-10-29 60 * This is used to calculate the .brk reservation for initial pagetables.
ea3186b9572a1b arch/x86/include/asm/pgtable_32.h Arvind Sankar 2020-10-29 61 * Enough space is reserved to allocate pagetables sufficient to cover all
ea3186b9572a1b arch/x86/include/asm/pgtable_32.h Arvind Sankar 2020-10-29 62 * of LOWMEM_PAGES, which is an upper bound on the size of the direct map of
ea3186b9572a1b arch/x86/include/asm/pgtable_32.h Arvind Sankar 2020-10-29 63 * lowmem.
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 64 *
ea3186b9572a1b arch/x86/include/asm/pgtable_32.h Arvind Sankar 2020-10-29 65 * With PAE paging (PTRS_PER_PMD > 1), we allocate PTRS_PER_PGD == 4 pages for
ea3186b9572a1b arch/x86/include/asm/pgtable_32.h Arvind Sankar 2020-10-29 66 * the PMD's in addition to the pages required for the last level pagetables.
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 67 */
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 @68 #if PTRS_PER_PMD > 1
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 69 #define PAGE_TABLE_SIZE(pages) (((pages) / PTRS_PER_PMD) + PTRS_PER_PGD)
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 70 #else
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 71 #define PAGE_TABLE_SIZE(pages) ((pages) / PTRS_PER_PGD)
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 72 #endif
1e620f9b23e598 arch/x86/include/asm/pgtable_32.h Boris Ostrovsky 2016-12-08 73
:::::: The code at line 68 was first introduced by commit
:::::: 1e620f9b23e598ab936ece12233e98e97930b692 x86/boot/32: Convert the 32-bit pgtable setup code from assembly to C
:::::: TO: Boris Ostrovsky <boris.ostrovsky@oracle.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2023-08-28 15:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-28 15:56 kernel test robot [this message]
2023-08-29 2:19 ` arch/x86/include/asm/pgtable_32.h:68:5: warning: 'PTRS_PER_PMD' is not defined, evaluates to 0 Philip Li
-- strict thread matches above, loose matches on Subject: below --
2023-11-12 10:48 arch/x86/include/asm/pgtable_32.h:68:5: warning: "PTRS_PER_PMD" " kernel test robot
2023-11-12 12:13 ` Philip Li
2024-12-15 15:44 kernel test robot
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