Commit 2a2848e7 authored by Anshuman Khandual's avatar Anshuman Khandual Committed by Catalin Marinas
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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: default avatarAnshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20220408041009.1259701-1-anshuman.khandual@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent b2d229d4

arch/arm64/include/asm/pgtable-hwdef.h

+2 −2
Original line number Diff line number Diff line
@@ -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



/*