sh: Fix get_wchan().

Some time ago the schedule frame size changed and we failed to reflect
this in get_wchan() at the time. This first popped up as a problem on
SH7751R where schedule_frame ended up being unaligned and generating
an unaligned trap. This fixes it up again..

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

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 7347f6afa030..486c06e18033 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -470,9 +470,10 @@ unsigned long get_wchan(struct task_struct *p)
          */
         pc = thread_saved_pc(p);
         if (in_sched_functions(pc)) {
-                schedule_frame = ((unsigned long *)(long)p->thread.sp)[1];
-                return (unsigned long)((unsigned long *)schedule_frame)[1];
+                schedule_frame = (unsigned long)p->thread.sp;
+                return ((unsigned long *)schedule_frame)[21];
         }
+
         return pc;
 }