mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-01 23:04:54 +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]>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* include/asm-xtensa/pgalloc.h
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*
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* Copyright (C) 2001-2007 Tensilica Inc.
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*/
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#ifndef _XTENSA_PGALLOC_H
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#define _XTENSA_PGALLOC_H
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#ifdef CONFIG_MMU
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#include <linux/highmem.h>
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#include <linux/slab.h>
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#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
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#define __HAVE_ARCH_PTE_ALLOC_ONE
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#include <asm-generic/pgalloc.h>
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/*
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* Allocating and freeing a pmd is trivial: the 1-entry pmd is
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* inside the pgd, so has no extra memory associated with it.
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*/
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#define pmd_populate_kernel(mm, pmdp, ptep) \
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(pmd_val(*(pmdp)) = ((unsigned long)ptep))
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#define pmd_populate(mm, pmdp, page) \
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(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
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#define pmd_pgtable(pmd) pmd_page(pmd)
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static inline pgd_t*
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pgd_alloc(struct mm_struct *mm)
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{
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return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
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}
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static inline void ptes_clear(pte_t *ptep)
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{
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int i;
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for (i = 0; i < PTRS_PER_PTE; i++)
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pte_clear(NULL, 0, ptep + i);
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}
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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{
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pte_t *ptep;
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ptep = (pte_t *)__pte_alloc_one_kernel(mm);
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if (!ptep)
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return NULL;
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ptes_clear(ptep);
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return ptep;
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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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struct page *page;
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page = __pte_alloc_one(mm, GFP_PGTABLE_USER);
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if (!page)
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return NULL;
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ptes_clear(page_address(page));
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return page;
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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#endif /* CONFIG_MMU */
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#endif /* _XTENSA_PGALLOC_H */
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