RDS would like to use the helper functions for managing pinned pages
added by Commit a91dbff5 ("sock: ulimit on MSG_ZEROCOPY pages")
Signed-off-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: NWillem de Bruijn <willemb@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>