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>
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 6334a4c..3a17830 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -474,7 +474,6 @@
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 @@
* 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;
}