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    Subject[PATCH v2 04/17] arm64: Refactor pud_huge for reusability
    Date
    Make pud_huge reusable for stage2 tables, independent
    of the stage1 levels.

    Cc: Steve Capper <steve.capper@arm.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Christoffer Dall <cdall@kernel.org>
    Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
    ---
    arch/arm64/include/asm/pgtable.h | 5 +++++
    arch/arm64/mm/hugetlbpage.c | 2 +-
    2 files changed, 6 insertions(+), 1 deletion(-)

    diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
    index 5e22503..4a16c11 100644
    --- a/arch/arm64/include/asm/pgtable.h
    +++ b/arch/arm64/include/asm/pgtable.h
    @@ -479,6 +479,11 @@ static inline phys_addr_t pmd_page_paddr(pmd_t pmd)
    #define __raw_pud_bad(pud) (!(pud_val(pud) & PUD_TABLE_BIT))
    #define __raw_pud_present(pud) pte_present(pud_pte(pud))

    +static inline int __raw_pud_huge(pud_t pud)
    +{
    + return pud_val(pud) && !(pud_val(pud) & PUD_TABLE_BIT);
    +}
    +
    static inline void __raw_set_pud(pud_t *pudp, pud_t pud)
    {
    WRITE_ONCE(*pudp, pud);
    diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
    index ecc6818..3f4bb43 100644
    --- a/arch/arm64/mm/hugetlbpage.c
    +++ b/arch/arm64/mm/hugetlbpage.c
    @@ -35,7 +35,7 @@ int pmd_huge(pmd_t pmd)
    int pud_huge(pud_t pud)
    {
    #ifndef __PAGETABLE_PMD_FOLDED
    - return pud_val(pud) && !(pud_val(pud) & PUD_TABLE_BIT);
    + return __raw_pud_huge(pud);
    #else
    return 0;
    #endif
    --
    2.7.4
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