sh64: oprofile: Fix up kernel stack pointer size mismatch.

For the backtrace code its assumed that the stack pointer is 32-bits,
which is not the case with the sh64 registers. Use the shared
kernel_stack_pointer() helper to get at the actual register, which
already takes care of the necessary typecasting.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/sh/oprofile/backtrace.c b/arch/sh/oprofile/backtrace.c
index 2bc74de23f08ddb425c086999af359874416e3b6..37f3a75ea6cbf5d18f28d41e2789fe3997a6df19 100644 (file)
--- a/arch/sh/oprofile/backtrace.c
+++ b/arch/sh/oprofile/backtrace.c
@@ -91,7 +91,7 @@ void sh_backtrace(struct pt_regs * const regs, unsigned int depth)
        if (depth > backtrace_limit)
                depth = backtrace_limit;
 
-       stackaddr = (unsigned long *)regs->regs[15];
+       stackaddr = (unsigned long *)kernel_stack_pointer(regs);
        if (!user_mode(regs)) {
                if (depth)
                        unwind_stack(NULL, regs, stackaddr,