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[PATCH] Fix up page_mkclean_one(): virtual caches, s390

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- 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>
This commit is contained in:
Peter Zijlstra 2006-12-22 14:25:52 +01:00 committed by Linus Torvalds
parent e21654a756
commit c2fda5fed8
1 changed files with 13 additions and 10 deletions
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23
mm/rmap.c
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@ -433,7 +433,7 @@ static int page_mkclean_one(struct page *page, struct vm_area_struct *vma)
{ {
struct mm_struct *mm = vma->vm_mm; struct mm_struct *mm = vma->vm_mm;
unsigned long address; unsigned long address;
pte_t *pte, entry; pte_t *pte;
spinlock_t *ptl; spinlock_t *ptl;
int ret = 0; int ret = 0;
@ -445,17 +445,18 @@ static int page_mkclean_one(struct page *page, struct vm_area_struct *vma)
if (!pte) if (!pte)
goto out; goto out;
if (!pte_dirty(*pte) && !pte_write(*pte)) if (pte_dirty(*pte) || pte_write(*pte)) {
goto unlock; pte_t entry;
entry = ptep_get_and_clear(mm, address, pte); flush_cache_page(vma, address, pte_pfn(*pte));
entry = pte_mkclean(entry); entry = ptep_clear_flush(vma, address, pte);
entry = pte_wrprotect(entry); entry = pte_wrprotect(entry);
ptep_establish(vma, address, pte, entry); entry = pte_mkclean(entry);
lazy_mmu_prot_update(entry); set_pte_at(vma, address, pte, entry);
ret = 1; lazy_mmu_prot_update(entry);
ret = 1;
}
unlock:
pte_unmap_unlock(pte, ptl); pte_unmap_unlock(pte, ptl);
out: out:
return ret; return ret;
@ -490,6 +491,8 @@ int page_mkclean(struct page *page)
if (mapping) if (mapping)
ret = page_mkclean_file(mapping, page); ret = page_mkclean_file(mapping, page);
} }
if (page_test_and_clear_dirty(page))
ret = 1;
return ret; return ret;
} }