4dedbf8dc1
With the recent mmu_gather changes that included generic RCU freeing of
page-tables, it is now quite straightforward to implement gup_fast() on
sparc64.
This patch:
Remove the page table quicklists. They are pointless and make it harder
to use RCU page table freeing and share code with other architectures.
BTW, this is the second time this has happened, see commit 3c93646524
("[SPARC64]: Kill pgtable quicklists and use SLAB.")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
#ifndef _SPARC64_PGALLOC_H
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#define _SPARC64_PGALLOC_H
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <asm/spitfire.h>
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#include <asm/cpudata.h>
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#include <asm/cacheflush.h>
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#include <asm/page.h>
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/* Page table allocation/freeing. */
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extern struct kmem_cache *pgtable_cache;
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
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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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kmem_cache_free(pgtable_cache, pgd);
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}
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#define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD)
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
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{
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return kmem_cache_alloc(pgtable_cache,
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GFP_KERNEL|__GFP_REPEAT);
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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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kmem_cache_free(pgtable_cache, pmd);
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}
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
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unsigned long address)
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{
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return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
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}
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static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
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unsigned long address)
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{
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struct page *page;
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pte_t *pte;
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pte = pte_alloc_one_kernel(mm, address);
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if (!pte)
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return NULL;
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page = virt_to_page(pte);
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pgtable_page_ctor(page);
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return page;
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}
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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free_page((unsigned long)pte);
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}
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static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
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{
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pgtable_page_dtor(ptepage);
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__free_page(ptepage);
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}
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#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE)
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#define pmd_populate(MM,PMD,PTE_PAGE) \
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pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
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#define pmd_pgtable(pmd) pmd_page(pmd)
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#define check_pgt_cache() do { } while (0)
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#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)
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#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)
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#endif /* _SPARC64_PGALLOC_H */
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