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-rw-r--r--mm/page-writeback.c32
-rw-r--r--mm/truncate.c25
2 files changed, 17 insertions, 40 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 237107c1b08..b3a198c9248 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -845,38 +845,6 @@ int set_page_dirty_lock(struct page *page)
EXPORT_SYMBOL(set_page_dirty_lock);
/*
- * Clear a page's dirty flag, while caring for dirty memory accounting.
- * Returns true if the page was previously dirty.
- */
-int test_clear_page_dirty(struct page *page)
-{
- struct address_space *mapping = page_mapping(page);
- unsigned long flags;
-
- if (!mapping)
- return TestClearPageDirty(page);
-
- write_lock_irqsave(&mapping->tree_lock, flags);
- if (TestClearPageDirty(page)) {
- radix_tree_tag_clear(&mapping->page_tree,
- page_index(page), PAGECACHE_TAG_DIRTY);
- write_unlock_irqrestore(&mapping->tree_lock, flags);
- /*
- * We can continue to use `mapping' here because the
- * page is locked, which pins the address_space
- */
- if (mapping_cap_account_dirty(mapping)) {
- page_mkclean(page);
- dec_zone_page_state(page, NR_FILE_DIRTY);
- }
- return 1;
- }
- write_unlock_irqrestore(&mapping->tree_lock, flags);
- return 0;
-}
-EXPORT_SYMBOL(test_clear_page_dirty);
-
-/*
* Clear a page's dirty flag, while caring for dirty memory accounting.
* Returns true if the page was previously dirty.
*
diff --git a/mm/truncate.c b/mm/truncate.c
index 9bfb8e85386..bf9e2965d66 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -51,6 +51,20 @@ static inline void truncate_partial_page(struct page *page, unsigned partial)
do_invalidatepage(page, partial);
}
+void cancel_dirty_page(struct page *page, unsigned int account_size)
+{
+ /* If we're cancelling the page, it had better not be mapped any more */
+ if (page_mapped(page)) {
+ static unsigned int warncount;
+
+ WARN_ON(++warncount < 5);
+ }
+
+ if (TestClearPageDirty(page) && account_size)
+ task_io_account_cancelled_write(account_size);
+}
+
+
/*
* If truncate cannot remove the fs-private metadata from the page, the page
* becomes anonymous. It will be left on the LRU and may even be mapped into
@@ -70,8 +84,8 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
if (PagePrivate(page))
do_invalidatepage(page, 0);
- if (test_clear_page_dirty(page))
- task_io_account_cancelled_write(PAGE_CACHE_SIZE);
+ cancel_dirty_page(page, PAGE_CACHE_SIZE);
+
ClearPageUptodate(page);
ClearPageMappedToDisk(page);
remove_from_page_cache(page);
@@ -350,7 +364,6 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
for (i = 0; !ret && i < pagevec_count(&pvec); i++) {
struct page *page = pvec.pages[i];
pgoff_t page_index;
- int was_dirty;
lock_page(page);
if (page->mapping != mapping) {
@@ -386,12 +399,8 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
PAGE_CACHE_SIZE, 0);
}
}
- was_dirty = test_clear_page_dirty(page);
- if (!invalidate_complete_page2(mapping, page)) {
- if (was_dirty)
- set_page_dirty(page);
+ if (!invalidate_complete_page2(mapping, page))
ret = -EIO;
- }
unlock_page(page);
}
pagevec_release(&pvec);