__btree_submit_bio_done);
}
+#ifdef CONFIG_MIGRATION
static int btree_migratepage(struct address_space *mapping,
struct page *newpage, struct page *page)
{
if (page_has_private(page) &&
!try_to_release_page(page, GFP_KERNEL))
return -EAGAIN;
-#ifdef CONFIG_MIGRATION
return migrate_page(mapping, newpage, page);
-#else
- return -ENOSYS;
-#endif
}
+#endif
static int btree_writepage(struct page *page, struct writeback_control *wbc)
{
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize, generation);
- BUG_ON(!root->node);
+ if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) {
+ free_extent_buffer(root->node);
+ return -EIO;
+ }
root->commit_root = btrfs_root_node(root);
return 0;
}