b4ed71f557
The naming of pgtable_page_{ctor,dtor}() seems to have confused a few
people, and until recently arm64 used these erroneously/pointlessly for
other levels of page table.
To make it incredibly clear that these only apply to the PTE level, and to
align with the naming of pgtable_pmd_page_{ctor,dtor}(), let's rename them
to pgtable_pte_page_{ctor,dtor}().
These changes were generated with the following shell script:
----
git grep -lw 'pgtable_page_.tor' | while read FILE; do
sed -i '{s/pgtable_page_ctor/pgtable_pte_page_ctor/}' $FILE;
sed -i '{s/pgtable_page_dtor/pgtable_pte_page_dtor/}' $FILE;
done
----
... with the documentation re-flowed to remain under 80 columns, and
whitespace fixed up in macros to keep backslashes aligned.
There should be no functional change as a result of this patch.
Link: http://lkml.kernel.org/r/20190722141133.3116-1-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#ifndef __ASM_CSKY_PGALLOC_H
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#define __ASM_CSKY_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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#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
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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(__pa(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(__pa(page_address(pte))));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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extern void pgd_init(unsigned long *p);
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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 *pte;
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unsigned long i;
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pte = (pte_t *) __get_free_page(GFP_KERNEL);
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if (!pte)
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return NULL;
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for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
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(pte + i)->pte_low = _PAGE_GLOBAL;
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return pte;
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}
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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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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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pgd_t *ret;
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pgd_t *init;
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ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
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if (ret) {
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init = pgd_offset(&init_mm, 0UL);
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pgd_init((unsigned long *)ret);
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memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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/* prevent out of order excute */
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smp_mb();
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#ifdef CONFIG_CPU_NEED_TLBSYNC
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dcache_wb_range((unsigned int)ret,
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(unsigned int)(ret + PTRS_PER_PGD));
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#endif
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}
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return ret;
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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_pte_page_dtor(pte); \
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tlb_remove_page(tlb, pte); \
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} while (0)
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extern void pagetable_init(void);
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extern void pre_mmu_init(void);
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extern void pre_trap_init(void);
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#endif /* __ASM_CSKY_PGALLOC_H */
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