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    Subject[PATCH v3 15/34] parisc: mm: Add p?d_large() definitions
    Date
    walk_page_range() is going to be allowed to walk page tables other than
    those of user space. For this it needs to know when it has reached a
    'leaf' entry in the page tables. This information is provided by the
    p?d_large() functions/macros.

    For parisc, we don't support large pages, so add stubs returning 0.

    CC: "James E.J. Bottomley" <jejb@parisc-linux.org>
    CC: Helge Deller <deller@gmx.de>
    CC: linux-parisc@vger.kernel.org
    Signed-off-by: Steven Price <steven.price@arm.com>
    ---
    arch/parisc/include/asm/pgtable.h | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
    index c7bb74e22436..1f38c85a9530 100644
    --- a/arch/parisc/include/asm/pgtable.h
    +++ b/arch/parisc/include/asm/pgtable.h
    @@ -302,6 +302,7 @@ extern unsigned long *empty_zero_page;
    #endif
    #define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
    #define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
    +#define pmd_large(x) (0)
    static inline void pmd_clear(pmd_t *pmd) {
    #if CONFIG_PGTABLE_LEVELS == 3
    if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
    @@ -324,6 +325,7 @@ static inline void pmd_clear(pmd_t *pmd) {
    #define pgd_none(x) (!pgd_val(x))
    #define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID))
    #define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT)
    +#define pgd_large(x) (0)
    static inline void pgd_clear(pgd_t *pgd) {
    #if CONFIG_PGTABLE_LEVELS == 3
    if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED)
    @@ -342,6 +344,7 @@ static inline void pgd_clear(pgd_t *pgd) {
    static inline int pgd_none(pgd_t pgd) { return 0; }
    static inline int pgd_bad(pgd_t pgd) { return 0; }
    static inline int pgd_present(pgd_t pgd) { return 1; }
    +static inline int pgd_large(pgd_t pgd) { return 0; }
    static inline void pgd_clear(pgd_t * pgdp) { }
    #endif

    --
    2.20.1
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