[PATCH] don't use REMOVE_LINKS/SET_LINKS for reparenting

There are places where kernel uses REMOVE_LINKS/SET_LINKS while changing
process's ->parent.  Use add_parent/remove_parent instead, they don't abuse
of global process list.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 6 insertions, 6 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index df26c33037d2..5b5e8b67680e 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -238,10 +238,10 @@ static void reparent_to_init(void)
 
         ptrace_unlink(current);
         /* Reparent to init */
-        REMOVE_LINKS(current);
+        remove_parent(current);
         current->parent = child_reaper;
         current->real_parent = child_reaper;
-        SET_LINKS(current);
+        add_parent(current);
 
         /* Set the exit signal to SIGCHLD so we signal init on exit */
         current->exit_signal = SIGCHLD;
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index d95a72c9279d..86a7f6c60cb2 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -35,9 +35,9 @@ void __ptrace_link(task_t *child, task_t *new_parent)
         if (child->parent == new_parent)
                 return;
         list_add(&child->ptrace_list, &child->parent->ptrace_children);
-        REMOVE_LINKS(child);
+        remove_parent(child);
         child->parent = new_parent;
-        SET_LINKS(child);
+        add_parent(child);
 }
  
 /*
@@ -77,9 +77,9 @@ void __ptrace_unlink(task_t *child)
         child->ptrace = 0;
         if (!list_empty(&child->ptrace_list)) {
                 list_del_init(&child->ptrace_list);
-                REMOVE_LINKS(child);
+                remove_parent(child);
                 child->parent = child->real_parent;
-                SET_LINKS(child);
+                add_parent(child);
         }
 
         ptrace_untrace(child);