ARM: 8074/1: traps: Make use of the frame_pointer macro

Use the newly-introduced frame_pointer macro to extract
the correct FP based on whether we are in THUMB2 mode or not.

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, 4 insertions, 2 deletions

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index abd2fc067736..c8e4bb714944 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -31,11 +31,13 @@
 #include <asm/exception.h>
 #include <asm/unistd.h>
 #include <asm/traps.h>
+#include <asm/ptrace.h>
 #include <asm/unwind.h>
 #include <asm/tls.h>
 #include <asm/system_misc.h>
 #include <asm/opcodes.h>
 
+
 static const char *handler[]= {
         "prefetch abort",
         "data abort",
@@ -184,7 +186,7 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
                 tsk = current;
 
         if (regs) {
-                fp = regs->ARM_fp;
+                fp = frame_pointer(regs);
                 mode = processor_mode(regs);
         } else if (tsk != current) {
                 fp = thread_saved_fp(tsk);
@@ -719,7 +721,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
                 dump_instr("", regs);
                 if (user_mode(regs)) {
                         __show_regs(regs);
-                        c_backtrace(regs->ARM_fp, processor_mode(regs));
+                        c_backtrace(frame_pointer(regs), processor_mode(regs));
                 }
         }
 #endif