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| author | Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-06-23 13:49:05 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-23 11:23:33 -0700 |
| commit | 788c7df451467df71638dd79a2d63d78c6e13b9c (patch) | |
| tree | 30714df634b620784b7a04fefc51d8c09291de38 /mm | |
| parent | a800faec1b21d7133b5f0c8c6dac593b7c4e118d (diff) | |
| download | lwn-788c7df451467df71638dd79a2d63d78c6e13b9c.tar.gz lwn-788c7df451467df71638dd79a2d63d78c6e13b9c.zip | |
hugetlb: fault flags instead of write_access
handle_mm_fault() is now passing fault flags rather than write_access
down to hugetlb_fault(), so better recognize that in hugetlb_fault(),
and in hugetlb_no_page().
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index a56e6f3ce979..d0351e31f474 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1985,7 +1985,7 @@ static struct page *hugetlbfs_pagecache_page(struct hstate *h, } static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma, - unsigned long address, pte_t *ptep, int write_access) + unsigned long address, pte_t *ptep, unsigned int flags) { struct hstate *h = hstate_vma(vma); int ret = VM_FAULT_SIGBUS; @@ -2053,7 +2053,7 @@ retry: * any allocations necessary to record that reservation occur outside * the spinlock. */ - if (write_access && !(vma->vm_flags & VM_SHARED)) + if ((flags & FAULT_FLAG_WRITE) && !(vma->vm_flags & VM_SHARED)) if (vma_needs_reservation(h, vma, address) < 0) { ret = VM_FAULT_OOM; goto backout_unlocked; @@ -2072,7 +2072,7 @@ retry: && (vma->vm_flags & VM_SHARED))); set_huge_pte_at(mm, address, ptep, new_pte); - if (write_access && !(vma->vm_flags & VM_SHARED)) { + if ((flags & FAULT_FLAG_WRITE) && !(vma->vm_flags & VM_SHARED)) { /* Optimization, do the COW without a second fault */ ret = hugetlb_cow(mm, vma, address, ptep, new_pte, page); } @@ -2091,7 +2091,7 @@ backout_unlocked: } int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, - unsigned long address, int write_access) + unsigned long address, unsigned int flags) { pte_t *ptep; pte_t entry; @@ -2112,7 +2112,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, mutex_lock(&hugetlb_instantiation_mutex); entry = huge_ptep_get(ptep); if (huge_pte_none(entry)) { - ret = hugetlb_no_page(mm, vma, address, ptep, write_access); + ret = hugetlb_no_page(mm, vma, address, ptep, flags); goto out_mutex; } @@ -2126,7 +2126,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, * page now as it is used to determine if a reservation has been * consumed. */ - if (write_access && !pte_write(entry)) { + if ((flags & FAULT_FLAG_WRITE) && !pte_write(entry)) { if (vma_needs_reservation(h, vma, address) < 0) { ret = VM_FAULT_OOM; goto out_mutex; @@ -2143,7 +2143,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, goto out_page_table_lock; - if (write_access) { + if (flags & FAULT_FLAG_WRITE) { if (!pte_write(entry)) { ret = hugetlb_cow(mm, vma, address, ptep, entry, pagecache_page); @@ -2152,7 +2152,8 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, entry = pte_mkdirty(entry); } entry = pte_mkyoung(entry); - if (huge_ptep_set_access_flags(vma, address, ptep, entry, write_access)) + if (huge_ptep_set_access_flags(vma, address, ptep, entry, + flags & FAULT_FLAG_WRITE)) update_mmu_cache(vma, address, entry); out_page_table_lock: |