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b7902ce175
MIPS allocates kernel PTE pages with __get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER) and user PTE pages with pte = alloc_pages(GFP_KERNEL, PTE_ORDER) and then uses clear_highpage(pte) to zero out the allocated page for the user page tables. The PTE_ORDER is hardwired to zero, which makes MIPS implementation almost identical to the generic one. Switch MIPS to the generic version that does exactly the same thing for the kernel page tables and adds __GFP_ACCOUNT for the user PTEs. The pte_free_kernel() and pte_free() versions on mips are identical to the generic ones and can be simply dropped. Link: http://lkml.kernel.org/r/1557296232-15361-9-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Paul Burton <paul.burton@mips.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Guo Ren <ren_guo@c-sky.com> Cc: Helge Deller <deller@gmx.de> Cc: Ley Foon Tan <lftan@altera.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@suse.com> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@armlinux.org.uk> Cc: Sam Creasey <sammy@sammy.net> Cc: Vincent Chen <deanbo422@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
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* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_PGALLOC_H
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#define _ASM_PGALLOC_H
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#include <linux/highmem.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
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pte_t *pte)
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{
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set_pmd(pmd, __pmd((unsigned long)pte));
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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pgtable_t pte)
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{
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set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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/*
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* Initialize a new pmd table with invalid pointers.
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*/
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extern void pmd_init(unsigned long page, unsigned long pagetable);
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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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set_pud(pud, __pud((unsigned long)pmd));
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}
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#endif
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/*
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* Initialize a new pgd / pmd table with invalid pointers.
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*/
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extern void pgd_init(unsigned long page);
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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{
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free_pages((unsigned long)pgd, PGD_ORDER);
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}
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#define __pte_free_tlb(tlb,pte,address) \
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do { \
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pgtable_page_dtor(pte); \
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tlb_remove_page((tlb), pte); \
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} while (0)
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#ifndef __PAGETABLE_PMD_FOLDED
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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pmd_t *pmd;
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pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
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if (pmd)
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pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
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return pmd;
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}
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static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
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{
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free_pages((unsigned long)pmd, PMD_ORDER);
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}
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#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
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#endif
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#ifndef __PAGETABLE_PUD_FOLDED
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static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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pud_t *pud;
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pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
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if (pud)
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pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
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return pud;
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}
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static inline void pud_free(struct mm_struct *mm, pud_t *pud)
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{
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free_pages((unsigned long)pud, PUD_ORDER);
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}
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static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
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{
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set_pgd(pgd, __pgd((unsigned long)pud));
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}
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#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
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#endif /* __PAGETABLE_PUD_FOLDED */
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#define check_pgt_cache() do { } while (0)
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extern void pagetable_init(void);
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#endif /* _ASM_PGALLOC_H */
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