dev->priv to netdev_priv(dev), drivers/net/tokenring/

Replacing accesses to dev->priv to netdev_priv(dev). The replacment
is safe when netdev_priv is used to access a private structure that is
right next to the net_device structure in memory.
Cf http://groups.google.com/group/comp.os.linux.development.system/browse_thread/thread/de19321bcd94dbb8/0d74a4adcd6177bd
This is the case when the net_device structure was allocated with
a call to alloc_netdev or one of its derivative.

Here is an excerpt of the semantic patch that performs the transformation

@ rule1 @
type T;
struct net_device *dev;
@@

 dev =
(
        alloc_netdev
|
        alloc_etherdev
|
        alloc_trdev
)
   (sizeof(T), ...)

@ rule1bis @
struct net_device *dev;
expression E;
@@
 dev->priv = E

@ rule2 depends on rule1 && !rule1bis  @
struct net_device *dev;
type rule1.T;
@@

- (T*) dev->priv
+ netdev_priv(dev)

PS: I have performed the same transformation on the whole kernel
and it affects around 70 files, most of them in drivers/net/.
Should I split my patch for each subnet directories ? (wireless/, wan/, etc)

Thanks to Thomas Surrel for helping me refining my semantic patch.

Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>

 3c359.c       |   58 +++++++++++++++++++++++++++++-----------------------------
 ibmtr.c       |   38 +++++++++++++++++++-------------------
 lanstreamer.c |   32 ++++++++++++++++----------------
 madgemc.c     |    4 ++--
 olympic.c     |   36 ++++++++++++++++++------------------
 tmspci.c      |    4 ++--
 6 files changed, 86 insertions(+), 86 deletions(-)
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 16 insertions, 16 deletions

diff --git a/drivers/net/tokenring/lanstreamer.c b/drivers/net/tokenring/lanstreamer.c
index fc4495581f96..49c4270ef5f7 100644
--- a/drivers/net/tokenring/lanstreamer.c
+++ b/drivers/net/tokenring/lanstreamer.c
@@ -246,7 +246,7 @@ static int __devinit streamer_init_one(struct pci_dev *pdev,
 	}
 
 	SET_MODULE_OWNER(dev);
-	streamer_priv = dev->priv;
+	streamer_priv = netdev_priv(dev);
 
 #if STREAMER_NETWORK_MONITOR
 #ifdef CONFIG_PROC_FS
@@ -405,7 +405,7 @@ static void __devexit streamer_remove_one(struct pci_dev *pdev)
 		return;
 	}
 
-	streamer_priv=dev->priv;
+	streamer_priv=netdev_priv(dev);
 	if (streamer_priv == NULL) {
 		printk(KERN_ERR "lanstreamer::streamer_remove_one, ERROR dev->priv is NULL\n");
 		return;
@@ -449,7 +449,7 @@ static int streamer_reset(struct net_device *dev)
 	struct sk_buff *skb = NULL;
 	__u16 misr;
 
-	streamer_priv = (struct streamer_private *) dev->priv;
+	streamer_priv = netdev_priv(dev);
 	streamer_mmio = streamer_priv->streamer_mmio;
 
 	writew(readw(streamer_mmio + BCTL) | BCTL_SOFTRESET, streamer_mmio + BCTL);
@@ -588,7 +588,7 @@ static int streamer_reset(struct net_device *dev)
 
 static int streamer_open(struct net_device *dev)
 {
-	struct streamer_private *streamer_priv = (struct streamer_private *) dev->priv;
+	struct streamer_private *streamer_priv = netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	unsigned long flags;
 	char open_error[255];
@@ -905,7 +905,7 @@ static int streamer_open(struct net_device *dev)
 static void streamer_rx(struct net_device *dev)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	struct streamer_rx_desc *rx_desc;
 	int rx_ring_last_received, length, frame_length, buffer_cnt = 0;
@@ -1030,7 +1030,7 @@ static irqreturn_t streamer_interrupt(int irq, void *dev_id)
 {
 	struct net_device *dev = (struct net_device *) dev_id;
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	__u16 sisr;
 	__u16 misr;
@@ -1153,7 +1153,7 @@ static irqreturn_t streamer_interrupt(int irq, void *dev_id)
 static int streamer_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	unsigned long flags ;
 
@@ -1204,7 +1204,7 @@ static int streamer_xmit(struct sk_buff *skb, struct net_device *dev)
 static int streamer_close(struct net_device *dev)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	unsigned long flags;
 	int i;
@@ -1270,7 +1270,7 @@ static int streamer_close(struct net_device *dev)
 static void streamer_set_rx_mode(struct net_device *dev)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	__u8 options = 0;
 	struct dev_mc_list *dmi;
@@ -1329,7 +1329,7 @@ static void streamer_set_rx_mode(struct net_device *dev)
 
 static void streamer_srb_bh(struct net_device *dev)
 {
-	struct streamer_private *streamer_priv = (struct streamer_private *) dev->priv;
+	struct streamer_private *streamer_priv = netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	__u16 srb_word;
 
@@ -1494,14 +1494,14 @@ static void streamer_srb_bh(struct net_device *dev)
 static struct net_device_stats *streamer_get_stats(struct net_device *dev)
 {
 	struct streamer_private *streamer_priv;
-	streamer_priv = (struct streamer_private *) dev->priv;
+	streamer_priv = netdev_priv(dev);
 	return (struct net_device_stats *) &streamer_priv->streamer_stats;
 }
 
 static int streamer_set_mac_address(struct net_device *dev, void *addr)
 {
 	struct sockaddr *saddr = addr;
-	struct streamer_private *streamer_priv = (struct streamer_private *) dev->priv;
+	struct streamer_private *streamer_priv = netdev_priv(dev);
 
 	if (netif_running(dev)) 
 	{
@@ -1526,7 +1526,7 @@ static int streamer_set_mac_address(struct net_device *dev, void *addr)
 static void streamer_arb_cmd(struct net_device *dev)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	__u8 header_len;
 	__u16 frame_len, buffer_len;
@@ -1741,7 +1741,7 @@ drop_frame:
 static void streamer_asb_bh(struct net_device *dev)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 
 	if (streamer_priv->asb_queued == 1) 
@@ -1785,7 +1785,7 @@ static void streamer_asb_bh(struct net_device *dev)
 static int streamer_change_mtu(struct net_device *dev, int mtu)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u16 max_mtu;
 
 	if (streamer_priv->streamer_ring_speed == 4)
@@ -1849,7 +1849,7 @@ static int streamer_proc_info(char *buffer, char **start, off_t offset,
 static int sprintf_info(char *buffer, struct net_device *dev)
 {
 	struct streamer_private *streamer_priv =
-	    (struct streamer_private *) dev->priv;
+	    netdev_priv(dev);
 	__u8 __iomem *streamer_mmio = streamer_priv->streamer_mmio;
 	struct streamer_adapter_addr_table sat;
 	struct streamer_parameters_table spt;