c
void vmbus_free_ring(struct vmbus_channel *channel) {
    // ... other code ...

    if (channel->ringbuffer_page) {
        // Prevent free_the_page from freeing this memory later (assuming it's called within cleanup)
        struct page *temp_page = channel->ringbuffer_page; 
        channel->ringbuffer_page = NULL;  // Set to NULL *before* cleanup

        hv_ringbuffer_cleanup(&channel->outbound);  
        hv_ringbuffer_cleanup(&channel->inbound);

        __free_pages(temp_page, get_order(channel->ringbuffer_pagecount << PAGE_SHIFT)); 
    }
}

static inline void free_the_page(struct page *page, unsigned int order) {
    if (pcp_allowed_order(order) && page != NULL) { /* Add NULL check */
        free_unref_page(page, order);
    }
}
