ARM: 8073/1: unwind: Use arm_get_current_stackframe

Make the unwind code use the correct API so that the frame pointer
is extracted from the correct register.

Signed-off-by: Nikolay Borisov <Nikolay.Borisov@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 5 deletions

diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c
index e67682f02cb2..a61a1dfbb0db 100644
--- a/arch/arm/kernel/unwind.c
+++ b/arch/arm/kernel/unwind.c
@@ -479,12 +479,10 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)
                 tsk = current;
 
         if (regs) {
-                frame.fp = regs->ARM_fp;
-                frame.sp = regs->ARM_sp;
-                frame.lr = regs->ARM_lr;
+                arm_get_current_stackframe(regs, &frame);
                 /* PC might be corrupted, use LR in that case. */
-                frame.pc = kernel_text_address(regs->ARM_pc)
-                         ? regs->ARM_pc : regs->ARM_lr;
+                if (!kernel_text_address(regs->ARM_pc))
+                        frame.pc = regs->ARM_lr;
         } else if (tsk == current) {
                 frame.fp = (unsigned long)__builtin_frame_address(0);
                 frame.sp = current_sp;