powerpc: apply recent changes to merged code

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 943425a..568ea33 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -248,7 +248,7 @@
 	clear_single_step(child);
 }
 
-int sys_ptrace(long request, long pid, long addr, long data)
+long sys_ptrace(long request, long pid, long addr, long data)
 {
 	struct task_struct *child;
 	int ret = -EPERM;