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SubjectRe: [PATCH v3 15/34] parisc: mm: Add p?d_large() definitions
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On 27.02.19 18:05, Steven Price wrote:
> 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.

We do support huge pages on parisc, but not yet on those levels.
So, you may add

Acked-by: Helge Deller <deller@gmx.de> # parisc

Helge

> 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
>
>

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