sh: fix get_wchan() for SH kernels without framepointers

Do not follow the frame pointers (/proc/X/task/1/stat) unless we were
compiled with them.

Signed-off-by: David McCullough <david_mccullough@au.securecomputing.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 6334a4c54c7c..3a1783010c03 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -474,7 +474,6 @@ out:
 
 unsigned long get_wchan(struct task_struct *p)
 {
-        unsigned long schedule_frame;
         unsigned long pc;
 
         if (!p || p == current || p->state == TASK_RUNNING)
@@ -484,10 +483,13 @@ unsigned long get_wchan(struct task_struct *p)
          * The same comment as on the Alpha applies here, too ...
          */
         pc = thread_saved_pc(p);
+
+#ifdef CONFIG_FRAME_POINTER
         if (in_sched_functions(pc)) {
-                schedule_frame = (unsigned long)p->thread.sp;
+                unsigned long schedule_frame = (unsigned long)p->thread.sp;
                 return ((unsigned long *)schedule_frame)[21];
         }
+#endif
 
         return pc;
 }