diff -Naur -X exclude-files ac_cur/arch/um/kernel/ptrace.c ac/arch/um/kernel/ptrace.c
--- ac_cur/arch/um/kernel/ptrace.c	Mon Oct  1 23:28:07 2001
+++ ac/arch/um/kernel/ptrace.c	Mon Oct  1 19:45:38 2001
@@ -11,6 +11,13 @@
 #include "asm/uaccess.h"
 #include "kern_util.h"
 
+/*
+ * Called by kernel/ptrace.c when detaching..
+ */
+void ptrace_disable(struct task_struct *child)
+{ 
+}
+
 int sys_ptrace(long request, long pid, long addr, long data)
 {
 	struct task_struct *child;