ARC: mm: switch pgtable_to to pte_t *
ARC is the only arch with unsigned long type (vs. struct page *). Historically this was done to avoid the page_address() calls in various arch hooks which need to get the virtual/logical address of the table. Some arches alternately define it as pte_t *, and is as efficient as unsigned long (generated code doesn't change) Suggested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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@ -43,7 +43,6 @@ typedef struct {
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typedef struct {
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unsigned long pgprot;
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} pgprot_t;
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typedef unsigned long pgtable_t;
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#define pte_val(x) ((x).pte)
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#define pgd_val(x) ((x).pgd)
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@ -60,7 +59,6 @@ typedef unsigned long pgtable_t;
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typedef unsigned long pte_t;
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typedef unsigned long pgd_t;
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typedef unsigned long pgprot_t;
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typedef unsigned long pgtable_t;
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#define pte_val(x) (x)
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#define pgd_val(x) (x)
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@ -71,6 +69,8 @@ typedef unsigned long pgtable_t;
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#endif
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typedef pte_t * pgtable_t;
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#define ARCH_PFN_OFFSET (CONFIG_LINUX_LINK_BASE >> PAGE_SHIFT)
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#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
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@ -107,7 +107,7 @@ pte_alloc_one(struct mm_struct *mm, unsigned long address)
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pgtable_t pte_pg;
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struct page *page;
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pte_pg = __get_free_pages(GFP_KERNEL | __GFP_REPEAT, __get_order_pte());
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pte_pg = (pgtable_t)__get_free_pages(GFP_KERNEL | __GFP_REPEAT, __get_order_pte());
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if (!pte_pg)
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return 0;
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memzero((void *)pte_pg, PTRS_PER_PTE * 4);
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@ -128,12 +128,12 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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static inline void pte_free(struct mm_struct *mm, pgtable_t ptep)
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{
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pgtable_page_dtor(virt_to_page(ptep));
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free_pages(ptep, __get_order_pte());
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free_pages((unsigned long)ptep, __get_order_pte());
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}
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#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)
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#define check_pgt_cache() do { } while (0)
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#define pmd_pgtable(pmd) pmd_page_vaddr(pmd)
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#define pmd_pgtable(pmd) ((pgtable_t) pmd_page_vaddr(pmd))
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#endif /* _ASM_ARC_PGALLOC_H */
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