diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2022-04-08 09:40:09 +0530 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-04-22 14:45:58 +0100 |
| commit | 2a2848e7c2fde1c26ff46998ac10f7bf9ca2de04 (patch) | |
| tree | 5c339067baa87c4ca1f9e56a62030ee0ba2e29ba | |
| parent | b2d229d4ddb17db541098b83524d901257e93845 (diff) | |
| download | linux-stable-2a2848e7c2fde1c26ff46998ac10f7bf9ca2de04.tar.gz | |
arm64/mm: Compute PTRS_PER_[PMD|PUD] independently of PTRS_PER_PTE
Possible page table entries (or pointers) on non-zero page table levels are
dependent on a single page size i.e PAGE_SIZE and size required for each
individual page table entry i.e 8 bytes. PTRS_PER_[PMD|PUD] as such are not
related to PTRS_PER_PTE in any manner, as being implied currently. So lets
just make this very explicit and compute these macros independently.
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20220408041009.1259701-1-anshuman.khandual@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/pgtable-hwdef.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 66671ff05183..dd3d12bce07b 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -49,7 +49,7 @@ #define PMD_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(2) #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) #define PMD_MASK (~(PMD_SIZE-1)) -#define PTRS_PER_PMD PTRS_PER_PTE +#define PTRS_PER_PMD (1 << (PAGE_SHIFT - 3)) #endif /* @@ -59,7 +59,7 @@ #define PUD_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(1) #define PUD_SIZE (_AC(1, UL) << PUD_SHIFT) #define PUD_MASK (~(PUD_SIZE-1)) -#define PTRS_PER_PUD PTRS_PER_PTE +#define PTRS_PER_PUD (1 << (PAGE_SHIFT - 3)) #endif /* |