pid: remove the child_reaper special case in init/main.c

This patchset is a cleanup and a preparation to unshare the pid namespace.
These prerequisites prepare for Eric's patchset to give a file descriptor
to a namespace and join an existing namespace.

This patch:

It turns out that the existing assignment in copy_process of the
child_reaper can handle the initial assignment of child_reaper we just
need to generalize the test in kernel/fork.c

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index f2b494d7c557..17aed4378eda 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1296,7 +1296,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                 tracehook_finish_clone(p, clone_flags, trace);
 
                 if (thread_group_leader(p)) {
-                        if (clone_flags & CLONE_NEWPID)
+                        if (is_child_reaper(pid))
                                 p->nsproxy->pid_ns->child_reaper = p;
 
                         p->signal->leader_pid = pid;