+ 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);
+