diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgalloc.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgalloc.h | 57 |
1 files changed, 4 insertions, 53 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgalloc.h b/arch/powerpc/include/asm/book3s/64/pgalloc.h index 138bc2ecc0c4..d5a44912902f 100644 --- a/arch/powerpc/include/asm/book3s/64/pgalloc.h +++ b/arch/powerpc/include/asm/book3s/64/pgalloc.h @@ -1,10 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _ASM_POWERPC_BOOK3S_64_PGALLOC_H #define _ASM_POWERPC_BOOK3S_64_PGALLOC_H /* - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ #include <linux/slab.h> @@ -19,29 +16,7 @@ struct vmemmap_backing { }; extern struct vmemmap_backing *vmemmap_list; -/* - * Functions that deal with pagetables that could be at any level of - * the table need to be passed an "index_size" so they know how to - * handle allocation. For PTE pages (which are linked to a struct - * page for now, and drawn from the main get_free_pages() pool), the - * allocation size will be (2^index_size * sizeof(pointer)) and - * allocations are drawn from the kmem_cache in PGT_CACHE(index_size). - * - * The maximum index size needs to be big enough to allow any - * pagetable sizes we need, but small enough to fit in the low bits of - * any page table pointer. In other words all pagetables, even tiny - * ones, must be aligned to allow at least enough low 0 bits to - * contain this value. This value is also used as a mask, so it must - * be one less than a power of two. - */ -#define MAX_PGTABLE_INDEX_SIZE 0xf - -extern struct kmem_cache *pgtable_cache[]; -#define PGT_CACHE(shift) pgtable_cache[shift] - -extern pte_t *pte_fragment_alloc(struct mm_struct *, int); extern pmd_t *pmd_fragment_alloc(struct mm_struct *, unsigned long); -extern void pte_fragment_free(unsigned long *, int); extern void pmd_fragment_free(unsigned long *); extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift); #ifdef CONFIG_SMP @@ -81,6 +56,9 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm) pgd = kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), pgtable_gfp_flags(mm, GFP_KERNEL)); + if (unlikely(!pgd)) + return pgd; + /* * Don't scan the PGD for pointers, it contains references to PUDs but * those references are not full pointers and so can't be recognised by @@ -185,31 +163,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, *pmd = __pmd(__pgtable_ptr_val(pte_page) | PMD_VAL_BITS); } -static inline pgtable_t pmd_pgtable(pmd_t pmd) -{ - return (pgtable_t)pmd_page_vaddr(pmd); -} - -static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) -{ - return (pte_t *)pte_fragment_alloc(mm, 1); -} - -static inline pgtable_t pte_alloc_one(struct mm_struct *mm) -{ - return (pgtable_t)pte_fragment_alloc(mm, 0); -} - -static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) -{ - pte_fragment_free((unsigned long *)pte, 1); -} - -static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) -{ - pte_fragment_free((unsigned long *)ptepage, 0); -} - static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, unsigned long address) { @@ -221,8 +174,6 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, pgtable_free_tlb(tlb, table, PTE_INDEX); } -#define check_pgt_cache() do { } while (0) - extern atomic_long_t direct_pages_count[MMU_PAGE_COUNT]; static inline void update_page_count(int psize, long count) { |