From 6f6aea7e966cda5a817d091e938c2d9b52209893 Mon Sep 17 00:00:00 2001 From: Mike Rapoport Date: Sun, 16 Aug 2020 17:24:03 +0300 Subject: [PATCH] parisc: fix PMD pages allocation by restoring pmd_alloc_one() 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()") Reported-by: Meelis Roos Signed-off-by: Mike Rapoport Tested-by: Meelis Roos Reviewed-by: Matthew Wilcox (Oracle) Link: https://lkml.kernel.org/r/9f2b5ebd-e4a4-0fa1-6cd3-4b9f6892d1ad@linux.ee Signed-off-by: Linus Torvalds --- 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 cc7ecc2e..a6482b2 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -10,6 +10,7 @@ #include +#define __HAVE_ARCH_PMD_ALLOC_ONE #define __HAVE_ARCH_PMD_FREE #define __HAVE_ARCH_PGD_FREE #include @@ -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) { -- 2.7.4