Merge branch 'tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-utrace

* 'tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-utrace:
tracehook: fix CLONE_PTRACE

include/linux/ptrace.h

···
 	child->ptrace = 0;
 	if (unlikely(ptrace)) {
 		child->ptrace = current->ptrace;
-		__ptrace_link(child, current->parent);
+		ptrace_link(child, current->parent);
 	}
 }
 

include/linux/tracehook.h

···
 					  unsigned long clone_flags,
 					  pid_t pid, struct task_struct *child)
 {
-	if (unlikely(trace)) {
+	if (unlikely(trace) || unlikely(clone_flags & CLONE_PTRACE)) {
 		/*
 		 * The child starts up with an immediate SIGSTOP.
 		 */