[PATCH] powerpc: export validate_sp for oprofile calltrace

[Anton Blanchard]

Export validate_sp so we can use it in the oprofile calltrace code.

Signed-off-by: Anton Blanchard <anton at samba.org>
---

Index: build/arch/powerpc/kernel/process.c
===================================================================
--- build.orig/arch/powerpc/kernel/process.c	2006-03-26 10:39:29.000000000 +1000
+++ build/arch/powerpc/kernel/process.c	2006-03-26 12:48:03.000000000 +1000
@@ -767,7 +767,7 @@ out:
 	return error;
 }
 
-static int validate_sp(unsigned long sp, struct task_struct *p,
+int validate_sp(unsigned long sp, struct task_struct *p,
 		       unsigned long nbytes)
 {
 	unsigned long stack_page = (unsigned long)task_stack_page(p);
@@ -805,6 +805,8 @@ static int validate_sp(unsigned long sp,
 #define FRAME_MARKER	2
 #endif
 
+EXPORT_SYMBOL(validate_sp);
+
 unsigned long get_wchan(struct task_struct *p)
 {
 	unsigned long ip, sp;
Index: build/include/asm-powerpc/processor.h
===================================================================
--- build.orig/include/asm-powerpc/processor.h	2006-03-24 15:51:22.000000000 +1100
+++ build/include/asm-powerpc/processor.h	2006-03-26 12:48:03.000000000 +1000
@@ -251,6 +251,10 @@ static inline unsigned long __pack_fe01(
 #define cpu_relax()	barrier()
 #endif
 
+/* Check that a certain kernel stack pointer is valid in task_struct p */
+int validate_sp(unsigned long sp, struct task_struct *p,
+                       unsigned long nbytes);
+
 /*
  * Prefetch macros.
  */