[PATCH] fix kernel-doc warnings in 2.6.20-rc1

[platform/kernel/linux-arm64.git] / mm / truncate.c

diff --git a/mm/truncate.c b/mm/truncate.c
index 11ca480..4a38dd1 100644 (file)
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/pagemap.h>
 #include <linux/pagevec.h>
+#include <linux/task_io_accounting_ops.h>
 #include <linux/buffer_head.h> /* grr. try_to_release_page,
                                   do_invalidatepage */
 
@@ -50,6 +51,22 @@ 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 &&
+                       mapping_cap_account_dirty(page->mapping)) {
+               dec_zone_page_state(page, NR_FILE_DIRTY);
+               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
@@ -66,10 +83,11 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
        if (page->mapping != mapping)
                return;
 
+       cancel_dirty_page(page, PAGE_CACHE_SIZE);
+
        if (PagePrivate(page))
                do_invalidatepage(page, 0);
 
-       clear_page_dirty(page);
        ClearPageUptodate(page);
        ClearPageMappedToDisk(page);
        remove_from_page_cache(page);
@@ -96,7 +114,6 @@ invalidate_complete_page(struct address_space *mapping, struct page *page)
                return 0;
 
        ret = remove_mapping(mapping, page);
-       ClearPageUptodate(page);
 
        return ret;
 }
@@ -349,7 +366,6 @@ 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) {
@@ -385,12 +401,8 @@ 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);