}
find_safe_buffer(struct dmabounce_device_info *device_info, dma_addr_t safe_dma_addr){	struct list_head *entry;	list_for_each(entry, &device_info->safe_buffers) {		struct safe_buffer *b =			list_entry(entry, struct safe_buffer, node);		if (b->safe_dma_addr == safe_dma_addr)			return b;	}	return NULL;}