Merge branch 'linux-linaro-lng-v3.18' into linux-linaro-lng-v3.18-rtlinux-lng-preempt-rt-3.18.11-2015.05linux-lng-preempt-rt-3.18.11-2015.04

Conflicts:
	include/linux/interrupt.h
	kernel/irq/manage.c

1 files changed, 39 insertions, 4 deletions

diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 587d63bcbd0e..fc17c6f71fd1 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -78,6 +78,41 @@ static void dbg(const char *fmt, ...)
 #define S3C24XX_SERIAL_MAJOR	204
 #define S3C24XX_SERIAL_MINOR	64
 
+#ifndef CONFIG_CPU_BIG_ENDIAN /* little endian */
+static inline void __hw_set_bit(int nr, volatile unsigned long *addr)
+{
+	__set_bit(nr, addr);
+}
+
+static inline void __hw_clear_bit(int nr, volatile unsigned long *addr)
+{
+	__clear_bit(nr, addr);
+}
+#else
+static inline void __hw_set_bit(int nr, volatile unsigned long *addr)
+{
+	unsigned long mask = BIT_MASK(nr);
+	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
+	unsigned long val = le32_to_cpu(*p);
+
+	val  |= mask;
+
+	*p = cpu_to_le32(val);
+}
+
+static inline void __hw_clear_bit(int nr, volatile unsigned long *addr)
+{
+	unsigned long mask = BIT_MASK(nr);
+	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
+
+	unsigned long val = le32_to_cpu(*p);
+
+	val &= ~mask;
+
+	*p = cpu_to_le32(val);
+}
+#endif
+
 /* macros to change one thing to another */
 
 #define tx_enabled(port) ((port)->unused[0])
@@ -157,7 +192,7 @@ static void s3c24xx_serial_stop_tx(struct uart_port *port)
 
 	if (tx_enabled(port)) {
 		if (s3c24xx_serial_has_interrupt_mask(port))
-			__set_bit(S3C64XX_UINTM_TXD,
+			__hw_set_bit(S3C64XX_UINTM_TXD,
 				portaddrl(port, S3C64XX_UINTM));
 		else
 			disable_irq_nosync(ourport->tx_irq);
@@ -176,7 +211,7 @@ static void s3c24xx_serial_start_tx(struct uart_port *port)
 			s3c24xx_serial_rx_disable(port);
 
 		if (s3c24xx_serial_has_interrupt_mask(port))
-			__clear_bit(S3C64XX_UINTM_TXD,
+			__hw_clear_bit(S3C64XX_UINTM_TXD,
 				portaddrl(port, S3C64XX_UINTM));
 		else
 			enable_irq(ourport->tx_irq);
@@ -191,7 +226,7 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port)
 	if (rx_enabled(port)) {
 		dbg("s3c24xx_serial_stop_rx: port=%p\n", port);
 		if (s3c24xx_serial_has_interrupt_mask(port))
-			__set_bit(S3C64XX_UINTM_RXD,
+			__hw_set_bit(S3C64XX_UINTM_RXD,
 				portaddrl(port, S3C64XX_UINTM));
 		else
 			disable_irq_nosync(ourport->rx_irq);
@@ -548,7 +583,7 @@ static int s3c64xx_serial_startup(struct uart_port *port)
 	ourport->tx_claimed = 1;
 
 	/* Enable Rx Interrupt */
-	__clear_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM));
+	__hw_clear_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM));
 	dbg("s3c64xx_serial_startup ok\n");
 	return ret;
 }