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    Subject[RFC PATCH 8/9] sparc: mm: migrate: add pmd swap entry to support thp migration.
    Date
    From: Zi Yan <zi.yan@cs.rutgers.edu>

    Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: sparclinux@vger.kernel.org
    Cc: linux-mm@kvack.org
    ---
    arch/sparc/include/asm/pgtable_32.h | 2 ++
    arch/sparc/include/asm/pgtable_64.h | 2 ++
    2 files changed, 4 insertions(+)

    diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
    index 4eebed6c6781..293bf9f8f949 100644
    --- a/arch/sparc/include/asm/pgtable_32.h
    +++ b/arch/sparc/include/asm/pgtable_32.h
    @@ -367,7 +367,9 @@ static inline swp_entry_t __swp_entry(unsigned long type, unsigned long offset)
    }

    #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
    +#define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val(pmd) })
    #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
    +#define __swp_entry_to_pmd(x) ((pmd_t) { (x).val })

    static inline unsigned long
    __get_phys (unsigned long addr)
    diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
    index 339920fdf9ed..2811aef4a636 100644
    --- a/arch/sparc/include/asm/pgtable_64.h
    +++ b/arch/sparc/include/asm/pgtable_64.h
    @@ -1031,7 +1031,9 @@ pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
    ((long)(offset) << (PAGE_SHIFT + 8UL))) \
    } )
    #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
    +#define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val(pmd) })
    #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
    +#define __swp_entry_to_pmd(x) ((pmd_t) { (x).val })

    int page_in_phys_avail(unsigned long paddr);

    --
    2.17.0
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