[M68KNOMMU]: use container_of() to access uart struct in Coldfire serial driver

[Greg Ungerer <gerg@snapgear.com>]

Use container_of() to get at uart struct field in port struct
in ColdFire serial driver.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
---

diff -Naurp linux-2.6.23-rc1/drivers/serial/mcf.c linux-2.6.23-rc1.platform/drivers/serial/mcf.c
--- linux-2.6.23-rc1/drivers/serial/mcf.c	2007-10-25 10:49:13.000000000 +1000
+++ linux-2.6.23-rc1.platform/drivers/serial/mcf.c	2007-10-30 11:18:30.000000000 +1000
@@ -69,7 +69,7 @@ static unsigned int mcf_tx_empty(struct 
 
 static unsigned int mcf_get_mctrl(struct uart_port *port)
 {
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned long flags;
 	unsigned int sigs;
 
@@ -87,7 +87,7 @@ static unsigned int mcf_get_mctrl(struct
 
 static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs)
 {
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
@@ -104,7 +104,7 @@ static void mcf_set_mctrl(struct uart_po
 
 static void mcf_start_tx(struct uart_port *port)
 {
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
@@ -117,7 +117,7 @@ static void mcf_start_tx(struct uart_por
 
 static void mcf_stop_tx(struct uart_port *port)
 {
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
@@ -130,7 +130,7 @@ static void mcf_stop_tx(struct uart_port
 
 static void mcf_stop_rx(struct uart_port *port)
 {
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
@@ -163,7 +163,7 @@ static void mcf_enable_ms(struct uart_po
 
 static int mcf_startup(struct uart_port *port)
 {
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
@@ -189,7 +189,7 @@ static int mcf_startup(struct uart_port 
 
 static void mcf_shutdown(struct uart_port *port)
 {
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
@@ -352,7 +352,7 @@ static void mcf_tx_chars(struct mcf_uart
 static irqreturn_t mcf_interrupt(int irq, void *data)
 {
 	struct uart_port *port = data;
-	struct mcf_uart *pp = (struct mcf_uart *) port;
+	struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
 	unsigned int isr;
 
 	isr = readb(port->membase + MCFUART_UISR) & pp->imr;
-
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