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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2006-12-22 14:25:52 +0100
committerChris Wright <chrisw@sous-sol.org>2007-01-10 11:05:23 -0800
commit8e609d9efea47564c000d486f558d0c0aba8617e (patch)
tree670cc12db332121e85e3e8a54f32196444796a03
parente26353af7096103cec474473cbd81dc4190bba77 (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> [chrisw: fold in d6e88e671ac1] Signed-off-by: Chris Wright <chrisw@sous-sol.org>
-rw-r--r--mm/rmap.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index d8a842a586db..8c5dfdffe355 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -432,7 +432,7 @@ 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;
@@ -444,17 +444,18 @@ 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(mm, address, pte, entry);
+ lazy_mmu_prot_update(entry);
+ ret = 1;
+ }
-unlock:
pte_unmap_unlock(pte, ptl);
out:
return ret;
@@ -489,6 +490,8 @@ 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;
}