ptrace: wait_task_zombie: s/->parent/->real_parent/
Change wait_task_zombie() to use ->real_parent instead of ->parent. We
could even use current afaics, but ->real_parent is more clean.
We know that the child is not ptrace_reparented() and thus they are equal.
But we should avoid using task_struct->parent, we are going to remove it.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/exit.c b/kernel/exit.c
index 938ccee..826e1dc 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1204,7 +1204,7 @@
* p->signal fields, because they are only touched by
* __exit_signal, which runs with tasklist_lock
* write-locked anyway, and so is excluded here. We do
- * need to protect the access to p->parent->signal fields,
+ * need to protect the access to parent->signal fields,
* as other threads in the parent group can be right
* here reaping other children at the same time.
*
@@ -1213,8 +1213,8 @@
* group including the group leader.
*/
thread_group_cputime(p, &cputime);
- spin_lock_irq(&p->parent->sighand->siglock);
- psig = p->parent->signal;
+ spin_lock_irq(&p->real_parent->sighand->siglock);
+ psig = p->real_parent->signal;
sig = p->signal;
psig->cutime =
cputime_add(psig->cutime,
@@ -1245,7 +1245,7 @@
sig->oublock + sig->coublock;
task_io_accounting_add(&psig->ioac, &p->ioac);
task_io_accounting_add(&psig->ioac, &sig->ioac);
- spin_unlock_irq(&p->parent->sighand->siglock);
+ spin_unlock_irq(&p->real_parent->sighand->siglock);
}
/*