[PATCH] uml pt_regs fixes

Real fix for UML pt_regs stuff.  Note set_irq_regs() logics in there...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 10 insertions, 9 deletions

diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index 7c41dabe7a2c..3c01c2bc979a 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -355,14 +355,16 @@ void forward_interrupts(int pid)
  */
 unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
 {
-       irq_enter();
-       __do_IRQ(irq);
-       irq_exit();
-       return 1;
+        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;
 }
 
 int um_request_irq(unsigned int irq, int fd, int type,
-                   irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                   irqreturn_t (*handler)(int, void *),
                    unsigned long irqflags, const char * devname,
                    void *dev_id)
 {
@@ -423,8 +425,7 @@ void __init init_IRQ(void)
         }
 }
 
-int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
-                                                             struct pt_regs *))
+int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *))
 {
         int fds[2], err;
 
diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c
index 0ad755ceb212..2b0ab438301c 100644
--- a/arch/um/kernel/sigio.c
+++ b/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, struct pt_regs *unused)
+static irqreturn_t sigio_interrupt(int irq, void *data)
 {
         char c;
 
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index a92965f8f9cd..2e354b3ca060 100644
--- a/arch/um/kernel/time.c
+++ b/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, struct pt_regs *regs)
+irqreturn_t um_timer(int irq, void *dev)
 {
         unsigned long long nsecs;
         unsigned long flags;