c
static void vmbus_free_ringbuffer_page(struct vmbus_channel *channel) {
    if (channel->ringbuffer_page && !channel->ringbuffer_page_freed) { // Use the flag approach from patch 3 for example
        __free_pages(channel->ringbuffer_page, get_order(channel->ringbuffer_pagecount << PAGE_SHIFT));
        channel->ringbuffer_page_freed = true;
        channel->ringbuffer_page = NULL;  //Ensure we set ringbuffer_page to NULL as we are freeing it.
    }
}

void vmbus_free_ring(struct vmbus_channel *channel) {
    // ...
    hv_ringbuffer_cleanup(&channel->outbound);
    hv_ringbuffer_cleanup(&channel->inbound);
    vmbus_free_ringbuffer_page(channel); // Call the specialized function
}


static inline void free_the_page(struct page *page, unsigned int order) {
    // Note: you may need modifications to handle the ringbuffer_page_freed flag
    // Or the call to this method could be removed from hv_ringbuffer_cleanup if appropriate
    if (pcp_allowed_order(order) && page != NULL && !page->freed) {
       free_unref_page(page, order);
       page->freed = true;
    }
}


