diff --git a/[refs] b/[refs]
index 29bda15c2184..b2832ed2d66d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7bea96fd22a8fd19f90817405b4abe032317a0e3
+refs/heads/master: b104189c203a47219e51ab179e50fd0c73ccea3b
diff --git a/trunk/arch/ppc/4xx_io/serial_sicc.c b/trunk/arch/ppc/4xx_io/serial_sicc.c
index 87fe9a89dba7..080a20531f8b 100644
--- a/trunk/arch/ppc/4xx_io/serial_sicc.c
+++ b/trunk/arch/ppc/4xx_io/serial_sicc.c
@@ -441,7 +441,7 @@ siccuart_rx_chars(struct SICC_info *info, struct pt_regs *regs)
 #ifdef SUPPORT_SYSRQ
         if (info->sysrq) {
             if (ch && time_before(jiffies, info->sysrq)) {
-                handle_sysrq(ch, regs, NULL);
+                handle_sysrq(ch, NULL);
                 info->sysrq = 0;
                 goto ignore_char;
             }
diff --git a/trunk/arch/um/drivers/line.c b/trunk/arch/um/drivers/line.c
index 426633e5d6e3..cfd9f01fd464 100644
--- a/trunk/arch/um/drivers/line.c
+++ b/trunk/arch/um/drivers/line.c
@@ -20,7 +20,7 @@
 
 #define LINE_BUFSIZE 4096
 
-static irqreturn_t line_interrupt(int irq, void *data)
+static irqreturn_t line_interrupt(int irq, void *data, struct pt_regs *unused)
 {
 	struct chan *chan = data;
 	struct line *line = chan->line;
@@ -364,7 +364,8 @@ void line_unthrottle(struct tty_struct *tty)
 		reactivate_chan(&line->chan_list, line->driver->read_irq);
 }
 
-static irqreturn_t line_write_interrupt(int irq, void *data)
+static irqreturn_t line_write_interrupt(int irq, void *data,
+					struct pt_regs *unused)
 {
 	struct chan *chan = data;
 	struct line *line = chan->line;
@@ -711,7 +712,7 @@ struct winch {
 	struct tty_struct *tty;
 };
 
-static irqreturn_t winch_interrupt(int irq, void *data)
+static irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused)
 {
 	struct winch *winch = data;
 	struct tty_struct *tty;
diff --git a/trunk/arch/um/drivers/mconsole_kern.c b/trunk/arch/um/drivers/mconsole_kern.c
index d08bd036ccb8..8568abff66b4 100644
--- a/trunk/arch/um/drivers/mconsole_kern.c
+++ b/trunk/arch/um/drivers/mconsole_kern.c
@@ -74,7 +74,8 @@ static void mc_work_proc(void *unused)
 
 static DECLARE_WORK(mconsole_work, mc_work_proc, NULL);
 
-static irqreturn_t mconsole_interrupt(int irq, void *dev_id)
+static irqreturn_t mconsole_interrupt(int irq, void *dev_id,
+				      struct pt_regs *regs)
 {
 	/* long to avoid size mismatch warnings from gcc */
 	long fd;
@@ -673,9 +674,8 @@ static void with_console(struct mc_request *req, void (*proc)(void *),
 static void sysrq_proc(void *arg)
 {
 	char *op = arg;
-	struct pt_regs *old_regs = set_irq_regs(&current->thread.regs);
+
 	handle_sysrq(*op, NULL);
-	set_irq_regs(old_regs);
 }
 
 void mconsole_sysrq(struct mc_request *req)
diff --git a/trunk/arch/um/drivers/net_kern.c b/trunk/arch/um/drivers/net_kern.c
index ec9eb8bd9432..c1c5604752fb 100644
--- a/trunk/arch/um/drivers/net_kern.c
+++ b/trunk/arch/um/drivers/net_kern.c
@@ -77,7 +77,7 @@ static void uml_dev_close(void* dev)
 	dev_close( (struct net_device *) dev);
 }
 
-irqreturn_t uml_net_interrupt(int irq, void *dev_id)
+irqreturn_t uml_net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
 	struct net_device *dev = dev_id;
 	struct uml_net_private *lp = dev->priv;
diff --git a/trunk/arch/um/drivers/port_kern.c b/trunk/arch/um/drivers/port_kern.c
index ce9f3733f73e..73755f37a8a8 100644
--- a/trunk/arch/um/drivers/port_kern.c
+++ b/trunk/arch/um/drivers/port_kern.c
@@ -47,7 +47,7 @@ struct connection {
 	struct port_list *port;
 };
 
-static irqreturn_t pipe_interrupt(int irq, void *data)
+static irqreturn_t pipe_interrupt(int irq, void *data, struct pt_regs *regs)
 {
 	struct connection *conn = data;
 	int fd;
@@ -152,7 +152,7 @@ void port_work_proc(void *unused)
 
 DECLARE_WORK(port_work, port_work_proc, NULL);
 
-static irqreturn_t port_interrupt(int irq, void *data)
+static irqreturn_t port_interrupt(int irq, void *data, struct pt_regs *regs)
 {
 	struct port_list *port = data;
 
diff --git a/trunk/arch/um/drivers/ubd_kern.c b/trunk/arch/um/drivers/ubd_kern.c
index bc458f57921b..f0b0668458b7 100644
--- a/trunk/arch/um/drivers/ubd_kern.c
+++ b/trunk/arch/um/drivers/ubd_kern.c
@@ -524,7 +524,7 @@ static void ubd_handler(void)
 	do_ubd_request(ubd_queue);
 }
 
-static irqreturn_t ubd_intr(int irq, void *dev)
+static irqreturn_t ubd_intr(int irq, void *dev, struct pt_regs *unused)
 {
 	ubd_handler();
 	return(IRQ_HANDLED);
diff --git a/trunk/arch/um/drivers/xterm_kern.c b/trunk/arch/um/drivers/xterm_kern.c
index a4ce7058e10e..6036ec85895a 100644
--- a/trunk/arch/um/drivers/xterm_kern.c
+++ b/trunk/arch/um/drivers/xterm_kern.c
@@ -21,7 +21,7 @@ struct xterm_wait {
 	int new_fd;
 };
 
-static irqreturn_t xterm_interrupt(int irq, void *data)
+static irqreturn_t xterm_interrupt(int irq, void *data, struct pt_regs *regs)
 {
 	struct xterm_wait *xterm = data;
 	int fd;
diff --git a/trunk/arch/um/include/irq_kern.h b/trunk/arch/um/include/irq_kern.h
index 81beb1841299..c222d56b1494 100644
--- a/trunk/arch/um/include/irq_kern.h
+++ b/trunk/arch/um/include/irq_kern.h
@@ -10,11 +10,12 @@
 #include "asm/ptrace.h"
 
 extern int um_request_irq(unsigned int irq, int fd, int type,
-			  irqreturn_t (*handler)(int, void *),
+			  irqreturn_t (*handler)(int, void *,
+						 struct pt_regs *),
 			  unsigned long irqflags,  const char * devname,
 			  void *dev_id);
 extern int init_aio_irq(int irq, char *name,
-			irqreturn_t (*handler)(int, void *));
+			irqreturn_t (*handler)(int, void *, struct pt_regs *));
 
 #endif
 
diff --git a/trunk/arch/um/kernel/irq.c b/trunk/arch/um/kernel/irq.c
index 3c01c2bc979a..7c41dabe7a2c 100644
--- a/trunk/arch/um/kernel/irq.c
+++ b/trunk/arch/um/kernel/irq.c
@@ -355,16 +355,14 @@ void forward_interrupts(int pid)
  */
 unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
 {
-	struct pt_regs *old_regs = set_irq_regs((struct pt_regs *)regs);
-	irq_enter();
-	__do_IRQ(irq);
-	irq_exit();
-	set_irq_regs(old_regs);
-	return 1;
+       irq_enter();
+       __do_IRQ(irq);
+       irq_exit();
+       return 1;
 }
 
 int um_request_irq(unsigned int irq, int fd, int type,
-		   irqreturn_t (*handler)(int, void *),
+		   irqreturn_t (*handler)(int, void *, struct pt_regs *),
 		   unsigned long irqflags, const char * devname,
 		   void *dev_id)
 {
@@ -425,7 +423,8 @@ void __init init_IRQ(void)
 	}
 }
 
-int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *))
+int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
+							     struct pt_regs *))
 {
 	int fds[2], err;
 
diff --git a/trunk/arch/um/kernel/sigio.c b/trunk/arch/um/kernel/sigio.c
index 2b0ab438301c..0ad755ceb212 100644
--- a/trunk/arch/um/kernel/sigio.c
+++ b/trunk/arch/um/kernel/sigio.c
@@ -17,7 +17,7 @@
 /* Protected by sigio_lock() called from write_sigio_workaround */
 static int sigio_irq_fd = -1;
 
-static irqreturn_t sigio_interrupt(int irq, void *data)
+static irqreturn_t sigio_interrupt(int irq, void *data, struct pt_regs *unused)
 {
 	char c;
 
diff --git a/trunk/arch/um/kernel/time.c b/trunk/arch/um/kernel/time.c
index 2e354b3ca060..a92965f8f9cd 100644
--- a/trunk/arch/um/kernel/time.c
+++ b/trunk/arch/um/kernel/time.c
@@ -86,7 +86,7 @@ static inline unsigned long long get_time(void)
 	return nsecs;
 }
 
-irqreturn_t um_timer(int irq, void *dev)
+irqreturn_t um_timer(int irq, void *dev, struct pt_regs *regs)
 {
 	unsigned long long nsecs;
 	unsigned long flags;