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authorOleg Nesterov <oleg@redhat.com>2011-06-22 23:09:39 +0200
committerOleg Nesterov <oleg@redhat.com>2011-06-27 20:30:09 +0200
commit0976a03e5ce8ec346e985f21046d7a75bb7fdffd (patch)
tree347ab2fa51689226d734b288f330b5ad16997d8e
parent8677347378044ab564470bced2275520efb3670d (diff)
downloadop-kernel-dev-0976a03e5ce8ec346e985f21046d7a75bb7fdffd.zip
op-kernel-dev-0976a03e5ce8ec346e985f21046d7a75bb7fdffd.tar.gz
reparent_leader: check EXIT_DEAD instead of task_detached()
Change reparent_leader() to check ->exit_state instead of ->exit_signal, this matches the similar EXIT_DEAD check in wait_consider_task() and allows us to cleanup the do_notify_parent/task_detached logic. task_detached() was really needed during reparenting before 9cd80bbb "do_wait() optimization: do not place sub-threads on ->children list" to filter out the sub-threads. After this change task_detached(p) can only be true if p is the dead group_leader and its parent ignores SIGCHLD, in this case the caller of do_notify_parent() is going to reap this task and it should set EXIT_DEAD. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Tejun Heo <tj@kernel.org>
-rw-r--r--kernel/exit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index f68d137..2b1ba80 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -742,7 +742,7 @@ static void reparent_leader(struct task_struct *father, struct task_struct *p,
{
list_move_tail(&p->sibling, &p->real_parent->children);
- if (task_detached(p))
+ if (p->exit_state == EXIT_DEAD)
return;
/*
* If this is a threaded reparent there is no need to
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