xen/netback: Pass (void *) to virt_to_page()

virt_to_page() takes a virtual address as argument but
the driver passes an unsigned long, which works because
the target platform(s) uses polymorphic macros to calculate
the page.

Since many architectures implement virt_to_pfn() as
a macro, this function becomes polymorphic and accepts both a
(unsigned long) and a (void *).

Fix this up by an explicit (void *) cast.

Cc: Wei Liu <wei.liu@kernel.org>
Cc: Paul Durrant <paul@xen.org>
Cc: xen-devel@lists.xenproject.org
Cc: netdev@vger.kernel.org
Acked-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index c1501f41e2d825be75cf9b71a38cf1ecc64a2c6c..caf0c815436c8112432abe763af4de96a16edb9c 100644 (file)
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -689,7 +689,7 @@ static void xenvif_fill_frags(struct xenvif_queue *queue, struct sk_buff *skb)
                prev_pending_idx = pending_idx;
 
                txp = &queue->pending_tx_info[pending_idx].req;
-               page = virt_to_page(idx_to_kaddr(queue, pending_idx));
+               page = virt_to_page((void *)idx_to_kaddr(queue, pending_idx));
                __skb_fill_page_desc(skb, i, page, txp->offset, txp->size);
                skb->len += txp->size;
                skb->data_len += txp->size;