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| author | Ingo Molnar <mingo@kernel.org> | 2025-03-06 23:00:16 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-08 00:09:09 +0100 |
| commit | 6914f7e2e25fac9d1d2b62c208eaa5f2bf810fe9 (patch) | |
| tree | 0415b08066d349a5f8419ed25a949121eaf5a3b5 | |
| parent | 3e385c0d6ce88ac9916dcf84267bd5855d830748 (diff) | |
x86/mm: Define PTRS_PER_PMD for assembly code too
Andy reported the following build warning from head_32.S:
In file included from arch/x86/kernel/head_32.S:29:
arch/x86/include/asm/pgtable_32.h:59:5: error: "PTRS_PER_PMD" is not defined, evaluates to 0 [-Werror=undef]
59 | #if PTRS_PER_PMD > 1
The reason is that on 2-level i386 paging the folded in PMD's
PTRS_PER_PMD constant is not defined in assembly headers,
only in generic MM C headers.
Instead of trying to fish out the definition from the generic
headers, just define it - it even has a comment for it already...
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/Z8oa8AUVyi2HWfo9@gmail.com
| -rw-r--r-- | arch/x86/include/asm/pgtable-2level_types.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/include/asm/pgtable-2level_types.h b/arch/x86/include/asm/pgtable-2level_types.h index 7f6ccff0ba72..4a12c276b181 100644 --- a/arch/x86/include/asm/pgtable-2level_types.h +++ b/arch/x86/include/asm/pgtable-2level_types.h @@ -23,17 +23,17 @@ typedef union { #define ARCH_PAGE_TABLE_SYNC_MASK PGTBL_PMD_MODIFIED /* - * traditional i386 two-level paging structure: + * Traditional i386 two-level paging structure: */ #define PGDIR_SHIFT 22 #define PTRS_PER_PGD 1024 - /* - * the i386 is two-level, so we don't really have any - * PMD directory physically. + * The i386 is two-level, so we don't really have any + * PMD directory physically: */ +#define PTRS_PER_PMD 1 #define PTRS_PER_PTE 1024 |