On Sun, Aug 16, 2020 at 05:24:03PM +0300, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
>
> Commit 1355c31eeb7e ("asm-generic: pgalloc: provide generic pmd_alloc_one()
> and pmd_free_one()") converted parisc to use generic version of
> pmd_alloc_one() but it missed the fact that parisc uses order-1 pages for
> PMD.
>
> Restore the original version of pmd_alloc_one() for parisc, just use
> GFP_PGTABLE_KERNEL that implies __GFP_ZERO instead of GFP_KERNEL and
> memset.
>
> Fixes: 1355c31eeb7e ("asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()")
> Repoerted-by: Meelis Roos <mroos@xxxxxxxx>
typo, "Reported-by"
Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
> Tested-by: Meelis Roos <mroos@xxxxxxxx>
> Link: https://lkml.kernel.org/r/9f2b5ebd-e4a4-0fa1-6cd3-4b9f6892d1ad@xxxxxxxx
> ---
>
> Hi,
>
> I've trimmed the 'cc list relatively to the bug report and added parisc
> maintainers.
>
> arch/parisc/include/asm/pgalloc.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h
> index cc7ecc2ef55d..a6482b2ce0ea 100644
> --- a/arch/parisc/include/asm/pgalloc.h
> +++ b/arch/parisc/include/asm/pgalloc.h
> @@ -10,6 +10,7 @@
>
> #include <asm/cache.h>
>
> +#define __HAVE_ARCH_PMD_ALLOC_ONE
> #define __HAVE_ARCH_PMD_FREE
> #define __HAVE_ARCH_PGD_FREE
> #include <asm-generic/pgalloc.h>
> @@ -67,6 +68,11 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
> (__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT)));
> }
>
> +static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
> +{
> + return (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_ORDER);
> +}
> +
> static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
> {
> if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED) {
> --
> 2.26.2
>
