x86: constify stacktrace_ops

.. as they're never written to.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/stacktrace.h b/include/asm-x86/stacktrace.h
index 6f0b545..70dd5ba 100644
--- a/include/asm-x86/stacktrace.h
+++ b/include/asm-x86/stacktrace.h
@@ -15,6 +15,6 @@
 };
 
 void dump_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack,
-		struct stacktrace_ops *ops, void *data);
+		const struct stacktrace_ops *ops, void *data);
 
 #endif