1 files changed, 10 insertions, 27 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index bca9951634d9..68070f34f0cf 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1845,30 +1845,16 @@ int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
 	return 0;
 }
 
-static int bget_one(handle_t *handle, struct inode *inode,
-		    struct buffer_head *bh)
-{
-	get_bh(bh);
-	return 0;
-}
-
-static int bput_one(handle_t *handle, struct inode *inode,
-		    struct buffer_head *bh)
-{
-	put_bh(bh);
-	return 0;
-}
-
 static int __ext4_journalled_writepage(struct page *page,
 				       unsigned int len)
 {
 	struct address_space *mapping = page->mapping;
 	struct inode *inode = mapping->host;
-	struct buffer_head *page_bufs = NULL;
 	handle_t *handle = NULL;
 	int ret = 0, err = 0;
 	int inline_data = ext4_has_inline_data(inode);
 	struct buffer_head *inode_bh = NULL;
+	loff_t size;
 
 	ClearPageChecked(page);
 
@@ -1878,14 +1864,6 @@ static int __ext4_journalled_writepage(struct page *page,
 		inode_bh = ext4_journalled_write_inline_data(inode, len, page);
 		if (inode_bh == NULL)
 			goto out;
-	} else {
-		page_bufs = page_buffers(page);
-		if (!page_bufs) {
-			BUG();
-			goto out;
-		}
-		ext4_walk_page_buffers(handle, inode, page_bufs, 0, len,
-				       NULL, bget_one);
 	}
 	/*
 	 * We need to release the page lock before we start the
@@ -1906,7 +1884,8 @@ static int __ext4_journalled_writepage(struct page *page,
 
 	lock_page(page);
 	put_page(page);
-	if (page->mapping != mapping) {
+	size = i_size_read(inode);
+	if (page->mapping != mapping || page_offset(page) > size) {
 		/* The page got truncated from under us */
 		ext4_journal_stop(handle);
 		ret = 0;
@@ -1916,6 +1895,13 @@ static int __ext4_journalled_writepage(struct page *page,
 	if (inline_data) {
 		ret = ext4_mark_inode_dirty(handle, inode);
 	} else {
+		struct buffer_head *page_bufs = page_buffers(page);
+
+		if (page->index == size >> PAGE_SHIFT)
+			len = size & ~PAGE_MASK;
+		else
+			len = PAGE_SIZE;
+
 		ret = ext4_walk_page_buffers(handle, inode, page_bufs, 0, len,
 					     NULL, do_journal_get_write_access);
 
@@ -1936,9 +1922,6 @@ static int __ext4_journalled_writepage(struct page *page,
 out:
 	unlock_page(page);
 out_no_pagelock:
-	if (!inline_data && page_bufs)
-		ext4_walk_page_buffers(NULL, inode, page_bufs, 0, len,
-				       NULL, bput_one);
 	brelse(inode_bh);
 	return ret;
 }