X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Ffilemap.c;h=f4d0cded0e10aa21b02707fcaf99c4cbcafa4f06;hb=cf03613e9662c28372b8c83538fb402df37c53f5;hp=9940895f734ccd8db949687618aee4a7e03cb701;hpb=bdb76ef5a4bc8676a81034a443f1eda450b4babb;p=linux-2.6

diff --git a/mm/filemap.c b/mm/filemap.c
index 9940895f73..f4d0cded0e 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -124,6 +124,18 @@ void __remove_from_page_cache(struct page *page)
 	mapping->nrpages--;
 	__dec_zone_page_state(page, NR_FILE_PAGES);
 	BUG_ON(page_mapped(page));
+
+	/*
+	 * Some filesystems seem to re-dirty the page even after
+	 * the VM has canceled the dirty bit (eg ext3 journaling).
+	 *
+	 * Fix it up by doing a final dirty accounting check after
+	 * having removed the page entirely.
+	 */
+	if (PageDirty(page) && mapping_cap_account_dirty(mapping)) {
+		dec_zone_page_state(page, NR_FILE_DIRTY);
+		dec_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
+	}
 }
 
 void remove_from_page_cache(struct page *page)
@@ -1300,7 +1312,7 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 
 	size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 	if (vmf->pgoff >= size)
-		goto outside_data_content;
+		return VM_FAULT_SIGBUS;
 
 	/* If we don't want any read-ahead, don't bother */
 	if (VM_RandomReadHint(vma))
@@ -1377,7 +1389,7 @@ retry_find:
 	if (unlikely(vmf->pgoff >= size)) {
 		unlock_page(page);
 		page_cache_release(page);
-		goto outside_data_content;
+		return VM_FAULT_SIGBUS;
 	}
 
 	/*
@@ -1388,15 +1400,6 @@ retry_find:
 	vmf->page = page;
 	return ret | VM_FAULT_LOCKED;
 
-outside_data_content:
-	/*
-	 * An external ptracer can access pages that normally aren't
-	 * accessible..
-	 */
-	if (vma->vm_mm == current->mm)
-		return VM_FAULT_SIGBUS;
-
-	/* Fall through to the non-read-ahead case */
 no_cached_page:
 	/*
 	 * We're only likely to ever get here if MADV_RANDOM is in