Re: mapping address pointer to page structure

. struct page *page = virt_to_page(skb->data); If skb->data page aligned?

. And can some one please tell what is the use of the functions like virt_to_page and kmap_atomic_to_page, Generally to lock the page in memory(esp while doing dma) using get_page().

i tried calling virt_to_page(skb->data), but when i print the data in the page address ( page_address(page) ) and the data in pointed by skb->data, i came to know its mapping to a wrong page. If skb->data is not page aligned then page_address(page) will be equal to skb->data+(somevalue) (on nearest page boundary).

-syed