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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2006-12-22 14:25:52 +0100
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-22 10:39:35 -0800
commitc2fda5fed81eea077363b285b66eafce20dfd45a (patch)
treedb4c7cdc8492df706a26eaeb050b8a788168fd32 /mm
parente21654a756177bf209d7a3cbe971f16104555f75 (diff)
[PATCH] Fix up page_mkclean_one(): virtual caches, s390
- add flush_cache_page() for all those virtual indexed cache architectures. - handle s390. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/rmap.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index b3deda8b5019..57306fa0114d 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -433,7 +433,7 @@ static int page_mkclean_one(struct page *page, struct vm_area_struct *vma)
{
struct mm_struct *mm = vma->vm_mm;
unsigned long address;
- pte_t *pte, entry;
+ pte_t *pte;
spinlock_t *ptl;
int ret = 0;
@@ -445,17 +445,18 @@ static int page_mkclean_one(struct page *page, struct vm_area_struct *vma)
if (!pte)
goto out;
- if (!pte_dirty(*pte) && !pte_write(*pte))
- goto unlock;
+ if (pte_dirty(*pte) || pte_write(*pte)) {
+ pte_t entry;
- entry = ptep_get_and_clear(mm, address, pte);
- entry = pte_mkclean(entry);
- entry = pte_wrprotect(entry);
- ptep_establish(vma, address, pte, entry);
- lazy_mmu_prot_update(entry);
- ret = 1;
+ flush_cache_page(vma, address, pte_pfn(*pte));
+ entry = ptep_clear_flush(vma, address, pte);
+ entry = pte_wrprotect(entry);
+ entry = pte_mkclean(entry);
+ set_pte_at(vma, address, pte, entry);
+ lazy_mmu_prot_update(entry);
+ ret = 1;
+ }
-unlock:
pte_unmap_unlock(pte, ptl);
out:
return ret;
@@ -490,6 +491,8 @@ int page_mkclean(struct page *page)
if (mapping)
ret = page_mkclean_file(mapping, page);
}
+ if (page_test_and_clear_dirty(page))
+ ret = 1;
return ret;
}

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