mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 22:34:33 +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]>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* OpenRISC Linux
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*
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* Linux architectural port borrowing liberally from similar works of
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* others. All original copyrights apply as per the original source
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* declaration.
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*
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* OpenRISC implementation:
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* Copyright (C) 2003 Matjaz Breskvar <[email protected]>
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* Copyright (C) 2010-2011 Jonas Bonn <[email protected]>
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* et al.
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*/
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#ifndef __ASM_OPENRISC_PGALLOC_H
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#define __ASM_OPENRISC_PGALLOC_H
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#include <asm/page.h>
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#include <linux/threads.h>
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#include <linux/mm.h>
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#include <linux/memblock.h>
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#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
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#include <asm-generic/pgalloc.h>
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extern int mem_init_done;
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#define pmd_populate_kernel(mm, pmd, pte) \
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set_pmd(pmd, __pmd(_KERNPG_TABLE + __pa(pte)))
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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struct page *pte)
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{
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set_pmd(pmd, __pmd(_KERNPG_TABLE +
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((unsigned long)page_to_pfn(pte) <<
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(unsigned long) PAGE_SHIFT)));
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}
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/*
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* Allocate and free page tables.
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*/
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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pgd_t *ret = (pgd_t *)__get_free_page(GFP_KERNEL);
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if (ret) {
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memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
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memcpy(ret + USER_PTRS_PER_PGD,
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swapper_pg_dir + USER_PTRS_PER_PGD,
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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}
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return ret;
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}
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#if 0
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/* FIXME: This seems to be the preferred style, but we are using
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* current_pgd (from mm->pgd) to load kernel pages so we need it
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* initialized. This needs to be looked into.
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*/
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extern inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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return (pgd_t *)get_zeroed_page(GFP_KERNEL);
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}
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#endif
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
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#define __pte_free_tlb(tlb, pte, addr) \
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do { \
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pgtable_pte_page_dtor(pte); \
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tlb_remove_page((tlb), (pte)); \
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} while (0)
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#endif
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