Re: [PATCH v12 3/5] arm64: pgtable: Add p*d_page_vaddr helper macros

Will Deacon
2018-06-04T12:13:26Z

On Fri, Jun 01, 2018 at 06:09:16PM +0530, Chintan Pandya wrote:
> Add helper macros to give virtual references to page
> tables. These will be used while freeing dangling
> page tables.
>
> Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
> ---
> arch/arm64/include/asm/pgtable.h | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
> index 7c4c8f3..ef4047f 100644
> --- a/arch/arm64/include/asm/pgtable.h
> +++ b/arch/arm64/include/asm/pgtable.h
> @@ -580,6 +580,9 @@ static inline phys_addr_t pgd_page_paddr(pgd_t pgd)
>
> #endif /* CONFIG_PGTABLE_LEVELS > 3 */
>
> +#define pmd_page_vaddr(pmd) __va(pmd_page_paddr(pmd))
> +#define pud_page_vaddr(pud) __va(pud_page_paddr(pud))

Are these actually needed, or do pte_offset_kernel and pmd_offset do the
job already?

Will