diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2021-09-20 14:59:31 +0530 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-09-29 16:54:33 +0100 |
| commit | f8b46c4b51ab109457770e662bb3d0cde390879f (patch) | |
| tree | a90f0ecfb87f95f31302461333b6c813f27bdaff /arch/arm64/include/asm/pgtable.h | |
| parent | e63cf610ead18d5f8df0739a36cba57ccba43f6b (diff) | |
arm64/mm: Add pud_sect_supported()
Section mapping at PUD level is supported only on 4K pages and currently it
gets verified with explicit #ifdef or IS_ENABLED() constructs. This adds a
new helper pud_sect_supported() for this purpose, which particularly cleans
up the HugeTLB code path. It updates relevant switch statements with checks
for __PAGETABLE_PMD_FOLDED in order to avoid build failures caused with two
identical switch case values in those code blocks.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/1632130171-472-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index dfa76afa0ccf..84fbb52b4224 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1022,6 +1022,11 @@ static inline pgprot_t arch_filter_pgprot(pgprot_t prot) return PAGE_READONLY_EXEC; } +static inline bool pud_sect_supported(void) +{ + return PAGE_SIZE == SZ_4K; +} + #endif /* !__ASSEMBLY__ */ |