mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 06:14:39 +01:00
Anshuman Khandual
1c2f7d14d8
Currently most platforms define pmd_pgtable() as pmd_page() duplicating the same code all over. Instead just define a default value i.e pmd_page() for pmd_pgtable() and let platforms override when required via <asm/pgtable.h>. All the existing platform that override pmd_pgtable() have been moved into their respective <asm/pgtable.h> header in order to precede before the new generic definition. This makes it much cleaner with reduced code. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Anshuman Khandual <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: Mike Rapoport <[email protected]> Cc: Nick Hu <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Guo Ren <[email protected]> Cc: Brian Cain <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Michal Simek <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Ley Foon Tan <[email protected]> Cc: Jonas Bonn <[email protected]> Cc: Stefan Kristiansson <[email protected]> Cc: Stafford Horne <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Christophe Leroy <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Yoshinori Sato <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Chris Zankel <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_PGALLOC_H
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#define _ASM_POWERPC_PGALLOC_H
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#include <linux/mm.h>
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#ifndef MODULE
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static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
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{
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if (unlikely(mm == &init_mm))
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return gfp;
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return gfp | __GFP_ACCOUNT;
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}
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#else /* !MODULE */
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static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
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{
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return gfp | __GFP_ACCOUNT;
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}
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#endif /* MODULE */
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#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)
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pte_t *pte_fragment_alloc(struct mm_struct *mm, int kernel);
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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{
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return (pte_t *)pte_fragment_alloc(mm, 1);
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}
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static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
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{
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return (pgtable_t)pte_fragment_alloc(mm, 0);
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}
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void pte_frag_destroy(void *pte_frag);
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void pte_fragment_free(unsigned long *table, int kernel);
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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pte_fragment_free((unsigned long *)pte, 1);
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}
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static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
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{
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pte_fragment_free((unsigned long *)ptepage, 0);
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}
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/*
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* Functions that deal with pagetables that could be at any level of
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* the table need to be passed an "index_size" so they know how to
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* handle allocation. For PTE pages, the allocation size will be
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* (2^index_size * sizeof(pointer)) and allocations are drawn from
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* the kmem_cache in PGT_CACHE(index_size).
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*
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* The maximum index size needs to be big enough to allow any
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* pagetable sizes we need, but small enough to fit in the low bits of
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* any page table pointer. In other words all pagetables, even tiny
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* ones, must be aligned to allow at least enough low 0 bits to
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* contain this value. This value is also used as a mask, so it must
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* be one less than a power of two.
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*/
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#define MAX_PGTABLE_INDEX_SIZE 0xf
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extern struct kmem_cache *pgtable_cache[];
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#define PGT_CACHE(shift) pgtable_cache[shift]
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#ifdef CONFIG_PPC_BOOK3S
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#include <asm/book3s/pgalloc.h>
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#else
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#include <asm/nohash/pgalloc.h>
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#endif
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#endif /* _ASM_POWERPC_PGALLOC_H */
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