1 files changed, 4 insertions, 0 deletions

diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index a64198fcfd02..57643b5b782f 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -251,6 +251,10 @@ static inline unsigned long __pack_fe01(unsigned int fpmode)
 #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.
  */