[PATCH] swsusp: Do not fail if resume device is not set

[pandora-kernel.git] / mm / truncate.c

diff --git a/mm/truncate.c b/mm/truncate.c
index e07b1e6..ecdfdcc 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 +51,26 @@ 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)) {
+               struct address_space *mapping = page->mapping;
+               if (mapping && mapping_cap_account_dirty(mapping)) {
+                       dec_zone_page_state(page, NR_FILE_DIRTY);
+                       if (account_size)
+                               task_io_account_cancelled_write(account_size);
+               }
+       }
+}
+EXPORT_SYMBOL(cancel_dirty_page);
+
 /*
  * 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 +87,11 @@ 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);
@@ -348,7 +370,6 @@ 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) {
@@ -384,12 +405,8 @@ 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);