Commit d1e98f42 authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Linus Torvalds

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: default avatarOleg Nesterov <oleg@redhat.com>
Acked-by: default avatarRoland McGrath <roland@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8053bdd5
......@@ -1204,7 +1204,7 @@ static int wait_task_zombie(struct task_struct *p, int options,
* 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 @@ static int wait_task_zombie(struct task_struct *p, int options,
* 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 @@ static int wait_task_zombie(struct task_struct *p, int options,
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);
}
/*
......
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