SPARC64: Fix FPU saving in 64-bit signal handling.

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: David S. Miller <davem@xxxxxxxxxxxxx>

Upstream commit: 7c3cce978e4f933ac13758ec5d2554fc8d0927d2

The calculation of the FPU reg save area pointer
was wrong.

Based upon an OOPS report from Tom Callaway.

Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
---
 arch/sparc64/kernel/signal.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -354,7 +354,7 @@ static int invalid_frame_pointer(void __
 static inline int
 save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
 {
-	unsigned long *fpregs = (unsigned long *)(regs+1);
+	unsigned long *fpregs = current_thread_info()->fpregs;
 	unsigned long fprs;
 	int err = 0;
 	

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