diff options
| -rw-r--r-- | fs/ext3/inode.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c index 5fa453b49a6..05e5c2e5c0d 100644 --- a/fs/ext3/inode.c +++ b/fs/ext3/inode.c @@ -1435,6 +1435,10 @@ static int journal_dirty_data_fn(handle_t *handle, struct buffer_head *bh) return 0; } +static int buffer_unmapped(handle_t *handle, struct buffer_head *bh) +{ + return !buffer_mapped(bh); +} /* * Note that we always start a transaction even if we're not journalling * data. This is to preserve ordering: any hole instantiation within @@ -1505,6 +1509,15 @@ static int ext3_ordered_writepage(struct page *page, if (ext3_journal_current_handle()) goto out_fail; + if (!page_has_buffers(page)) { + create_empty_buffers(page, inode->i_sb->s_blocksize, + (1 << BH_Dirty)|(1 << BH_Uptodate)); + } else if (!walk_page_buffers(NULL, page_buffers(page), 0, PAGE_CACHE_SIZE, NULL, buffer_unmapped)) { + /* Provide NULL instead of get_block so that we catch bugs if buffers weren't really mapped */ + return block_write_full_page(page, NULL, wbc); + } + page_bufs = page_buffers(page); + handle = ext3_journal_start(inode, ext3_writepage_trans_blocks(inode)); if (IS_ERR(handle)) { @@ -1512,11 +1525,6 @@ static int ext3_ordered_writepage(struct page *page, goto out_fail; } - if (!page_has_buffers(page)) { - create_empty_buffers(page, inode->i_sb->s_blocksize, - (1 << BH_Dirty)|(1 << BH_Uptodate)); - } - page_bufs = page_buffers(page); walk_page_buffers(handle, page_bufs, 0, PAGE_CACHE_SIZE, NULL, bget_one); |