From: Hugh Dickins Date: Sun, 30 Oct 2005 01:16:09 +0000 (-0700) Subject: [PATCH] mm: sh64 hugetlbpage.c X-Git-Tag: v2.6.15-rc1~730^2^2~56 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=147efea8ebb034b48aee806caae1da9a2ee41b38;p=linux-2.6 [PATCH] mm: sh64 hugetlbpage.c The sh64 hugetlbpage.c seems to be erroneous, left over from a bygone age, clashing with the common hugetlb.c. Replace it by a copy of the sh hugetlbpage.c. Except, delete that mk_pte_huge macro neither uses. Signed-off-by: Hugh Dickins Acked-by: Paul Mundt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/sh/mm/hugetlbpage.c b/arch/sh/mm/hugetlbpage.c index 95bb1a6c60..6b7a7688c9 100644 --- a/arch/sh/mm/hugetlbpage.c +++ b/arch/sh/mm/hugetlbpage.c @@ -54,8 +54,6 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) return pte; } -#define mk_pte_huge(entry) do { pte_val(entry) |= _PAGE_SZHUGE; } while (0) - void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t entry) { diff --git a/arch/sh64/mm/hugetlbpage.c b/arch/sh64/mm/hugetlbpage.c index dcd9c8a8ba..ed6a505b3e 100644 --- a/arch/sh64/mm/hugetlbpage.c +++ b/arch/sh64/mm/hugetlbpage.c @@ -54,41 +54,31 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) return pte; } -#define mk_pte_huge(entry) do { pte_val(entry) |= _PAGE_SZHUGE; } while (0) - -static void set_huge_pte(struct mm_struct *mm, struct vm_area_struct *vma, - struct page *page, pte_t * page_table, int write_access) +void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t entry) { - unsigned long i; - pte_t entry; - - add_mm_counter(mm, rss, HPAGE_SIZE / PAGE_SIZE); - - if (write_access) - entry = pte_mkwrite(pte_mkdirty(mk_pte(page, - vma->vm_page_prot))); - else - entry = pte_wrprotect(mk_pte(page, vma->vm_page_prot)); - entry = pte_mkyoung(entry); - mk_pte_huge(entry); + int i; for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) { - set_pte(page_table, entry); - page_table++; - + set_pte_at(mm, addr, ptep, entry); + ptep++; + addr += PAGE_SIZE; pte_val(entry) += PAGE_SIZE; } } -pte_t huge_ptep_get_and_clear(pte_t *ptep) +pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) { pte_t entry; + int i; entry = *ptep; for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) { - pte_clear(pte); - pte++; + pte_clear(mm, addr, ptep); + addr += PAGE_SIZE; + ptep++; } return entry; @@ -106,79 +96,6 @@ int is_aligned_hugepage_range(unsigned long addr, unsigned long len) return 0; } -int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, - struct vm_area_struct *vma) -{ - pte_t *src_pte, *dst_pte, entry; - struct page *ptepage; - unsigned long addr = vma->vm_start; - unsigned long end = vma->vm_end; - int i; - - while (addr < end) { - dst_pte = huge_pte_alloc(dst, addr); - if (!dst_pte) - goto nomem; - src_pte = huge_pte_offset(src, addr); - BUG_ON(!src_pte || pte_none(*src_pte)); - entry = *src_pte; - ptepage = pte_page(entry); - get_page(ptepage); - for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) { - set_pte(dst_pte, entry); - pte_val(entry) += PAGE_SIZE; - dst_pte++; - } - add_mm_counter(dst, rss, HPAGE_SIZE / PAGE_SIZE); - addr += HPAGE_SIZE; - } - return 0; - -nomem: - return -ENOMEM; -} - -int follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, - struct page **pages, struct vm_area_struct **vmas, - unsigned long *position, int *length, int i) -{ - unsigned long vaddr = *position; - int remainder = *length; - - WARN_ON(!is_vm_hugetlb_page(vma)); - - while (vaddr < vma->vm_end && remainder) { - if (pages) { - pte_t *pte; - struct page *page; - - pte = huge_pte_offset(mm, vaddr); - - /* hugetlb should be locked, and hence, prefaulted */ - BUG_ON(!pte || pte_none(*pte)); - - page = pte_page(*pte); - - WARN_ON(!PageCompound(page)); - - get_page(page); - pages[i] = page; - } - - if (vmas) - vmas[i] = vma; - - vaddr += PAGE_SIZE; - --remainder; - ++i; - } - - *length = remainder; - *position = vaddr; - - return i; -} - struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int write) { @@ -195,84 +112,3 @@ struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, { return NULL; } - -void unmap_hugepage_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) -{ - struct mm_struct *mm = vma->vm_mm; - unsigned long address; - pte_t *pte; - struct page *page; - int i; - - BUG_ON(start & (HPAGE_SIZE - 1)); - BUG_ON(end & (HPAGE_SIZE - 1)); - - for (address = start; address < end; address += HPAGE_SIZE) { - pte = huge_pte_offset(mm, address); - BUG_ON(!pte); - if (pte_none(*pte)) - continue; - page = pte_page(*pte); - put_page(page); - for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) { - pte_clear(mm, address+(i*PAGE_SIZE), pte); - pte++; - } - } - add_mm_counter(mm, rss, -((end - start) >> PAGE_SHIFT)); - flush_tlb_range(vma, start, end); -} - -int hugetlb_prefault(struct address_space *mapping, struct vm_area_struct *vma) -{ - struct mm_struct *mm = current->mm; - unsigned long addr; - int ret = 0; - - BUG_ON(vma->vm_start & ~HPAGE_MASK); - BUG_ON(vma->vm_end & ~HPAGE_MASK); - - spin_lock(&mm->page_table_lock); - for (addr = vma->vm_start; addr < vma->vm_end; addr += HPAGE_SIZE) { - unsigned long idx; - pte_t *pte = huge_pte_alloc(mm, addr); - struct page *page; - - if (!pte) { - ret = -ENOMEM; - goto out; - } - if (!pte_none(*pte)) - continue; - - idx = ((addr - vma->vm_start) >> HPAGE_SHIFT) - + (vma->vm_pgoff >> (HPAGE_SHIFT - PAGE_SHIFT)); - page = find_get_page(mapping, idx); - if (!page) { - /* charge the fs quota first */ - if (hugetlb_get_quota(mapping)) { - ret = -ENOMEM; - goto out; - } - page = alloc_huge_page(); - if (!page) { - hugetlb_put_quota(mapping); - ret = -ENOMEM; - goto out; - } - ret = add_to_page_cache(page, mapping, idx, GFP_ATOMIC); - if (! ret) { - unlock_page(page); - } else { - hugetlb_put_quota(mapping); - free_huge_page(page); - goto out; - } - } - set_huge_pte(mm, vma, page, pte, vma->vm_flags & VM_WRITE); - } -out: - spin_unlock(&mm->page_table_lock); - return ret; -}