mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-08 18:43:21 +01:00
Mike Rapoport
f9cb654cb5
Most architectures define pgd_free() as a wrapper for free_page(). Provide a generic version in asm-generic/pgalloc.h and enable its use for most architectures. Signed-off-by: Mike Rapoport <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Reviewed-by: Pekka Enberg <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> [m68k] Cc: Abdul Haleem <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Christophe Leroy <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Max Filippov <[email protected]> Cc: Peter Zijlstra (Intel) <[email protected]> Cc: Satheesh Rajendran <[email protected]> Cc: Stafford Horne <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Matthew Wilcox <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2009 Chen Liqin <[email protected]>
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* Copyright (C) 2012 Regents of the University of California
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*/
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#ifndef _ASM_RISCV_PGALLOC_H
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#define _ASM_RISCV_PGALLOC_H
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#include <linux/mm.h>
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#include <asm/tlb.h>
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#ifdef CONFIG_MMU
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#include <asm-generic/pgalloc.h>
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static inline void pmd_populate_kernel(struct mm_struct *mm,
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pmd_t *pmd, pte_t *pte)
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{
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unsigned long pfn = virt_to_pfn(pte);
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set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
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}
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static inline void pmd_populate(struct mm_struct *mm,
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pmd_t *pmd, pgtable_t pte)
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{
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unsigned long pfn = virt_to_pfn(page_address(pte));
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set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
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}
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#ifndef __PAGETABLE_PMD_FOLDED
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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unsigned long pfn = virt_to_pfn(pmd);
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set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
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}
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#endif /* __PAGETABLE_PMD_FOLDED */
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#define pmd_pgtable(pmd) pmd_page(pmd)
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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pgd_t *pgd;
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pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
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if (likely(pgd != NULL)) {
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memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
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/* Copy kernel mappings */
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memcpy(pgd + USER_PTRS_PER_PGD,
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init_mm.pgd + 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 pgd;
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}
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#ifndef __PAGETABLE_PMD_FOLDED
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#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)
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#endif /* __PAGETABLE_PMD_FOLDED */
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#define __pte_free_tlb(tlb, pte, buf) \
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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 /* CONFIG_MMU */
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#endif /* _ASM_RISCV_PGALLOC_H */
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