176 	struct buffer_head *obh, *nbh;  in nilfs_btnode_prepare_change_key()  local
184 	obh = ctxt->bh;  in nilfs_btnode_prepare_change_key()
188 		struct page *opage = obh->b_page;  in nilfs_btnode_prepare_change_key()
223 	BUG_ON(nbh == obh);  in nilfs_btnode_prepare_change_key()
228 	unlock_page(obh->b_page);  in nilfs_btnode_prepare_change_key()
239 	struct buffer_head *obh = ctxt->bh, *nbh = ctxt->newbh;  in nilfs_btnode_commit_change_key()  local
247 		opage = obh->b_page;  in nilfs_btnode_commit_change_key()
253 		mark_buffer_dirty(obh);  in nilfs_btnode_commit_change_key()
260 		opage->index = obh->b_blocknr = newkey;  in nilfs_btnode_commit_change_key()
263 		nilfs_copy_buffer(nbh, obh);  in nilfs_btnode_commit_change_key()
268 		nilfs_btnode_delete(obh); /* will decrement bh->b_count */  in nilfs_btnode_commit_change_key()