From bcbe7f777eb396f9bbf4cb1cab3b206f50881191 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Fri, 29 Apr 2016 23:26:16 +1000 Subject: [PATCH] powerpc/mm: Simplify the code dropping 4-level table #ifdef Simplify the code by dropping 4-level page table #ifdef. We are always 4-level now. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/book3s/64/pgalloc.h | 57 +++++++------------- 1 file changed, 18 insertions(+), 39 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/pgalloc.h b/arch/powerpc/include/asm/book3s/64/pgalloc.h index 54017260c8bf..2a246245eca0 100644 --- a/arch/powerpc/include/asm/book3s/64/pgalloc.h +++ b/arch/powerpc/include/asm/book3s/64/pgalloc.h @@ -51,7 +51,6 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); } -#ifndef CONFIG_PPC_64K_PAGES static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) { pgd_set(pgd, __pgtable_ptr_val(pud)); @@ -78,7 +77,13 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, { pmd_set(pmd, __pgtable_ptr_val(pte)); } - +/* + * FIXME!! + * Between 4K and 64K pages, we differ in what is stored in pmd. ie. + * typedef pte_t *pgtable_t; -> 64K + * typedef struct page *pgtable_t; -> 4k + */ +#ifdef CONFIG_PPC_4K_PAGES static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte_page) { @@ -176,36 +181,6 @@ extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift); extern void __tlb_remove_table(void *_table); #endif -#ifndef __PAGETABLE_PUD_FOLDED -/* book3s 64 is 4 level page table */ -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) -{ - pgd_set(pgd, __pgtable_ptr_val(pud)); -} - -static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) -{ - return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), - GFP_KERNEL|__GFP_REPEAT); -} - -static inline void pud_free(struct mm_struct *mm, pud_t *pud) -{ - kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud); -} -#endif - -static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) -{ - pud_set(pud, __pgtable_ptr_val(pmd)); -} - -static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, - pte_t *pte) -{ - pmd_set(pmd, __pgtable_ptr_val(pte)); -} - static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte_page) { @@ -245,7 +220,7 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, tlb_flush_pgtable(tlb, address); pgtable_free_tlb(tlb, table, 0); } -#endif /* CONFIG_PPC_64K_PAGES */ +#endif /* CONFIG_PPC_4K_PAGES */ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { @@ -258,13 +233,17 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd); } -#define __pmd_free_tlb(tlb, pmd, addr) \ - pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX) -#ifndef __PAGETABLE_PUD_FOLDED -#define __pud_free_tlb(tlb, pud, addr) \ - pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE) +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, + unsigned long address) +{ + return pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX); +} -#endif /* __PAGETABLE_PUD_FOLDED */ +static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, + unsigned long address) +{ + pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE); +} #define check_pgt_cache() do { } while (0) -- 2.20.1