[PATCH] powerpc: export validate_sp for oprofile calltrace
Export validate_sp so we can use it in the oprofile calltrace code.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index c6e81bb..706090c 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -770,7 +770,7 @@
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);
@@ -808,6 +808,8 @@
#define FRAME_MARKER 2
#endif
+EXPORT_SYMBOL(validate_sp);
+
unsigned long get_wchan(struct task_struct *p)
{
unsigned long ip, sp;
diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index a64198f..57643b5 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -251,6 +251,10 @@
#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.
*/