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Message-ID: <20130609170023.GA5233@redhat.com> Date: Sun, 9 Jun 2013 19:00:23 +0200 From: Oleg Nesterov <oleg@...hat.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: "Eric W. Biederman" <ebiederm@...ssion.com>, Michal Hocko <mhocko@...e.cz>, Pavel Emelyanov <xemul@...allels.com>, Sergey Dyasly <dserrg@...il.com>, linux-kernel@...r.kernel.org Subject: [PATCH 1/4] de_thread: use change_pid() rather than detach_pid/attach_pid de_thread() can use change_pid() instead of detach + attach. This looks better and this ensures that, say, next_thread() can never see a task with ->pid == NULL. Signed-off-by: Oleg Nesterov <oleg@...hat.com> --- fs/exec.c | 3 +-- 1 files changed, 1 insertions(+), 2 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 6430195..00eaba7 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -945,9 +945,8 @@ static int de_thread(struct task_struct *tsk) * Note: The old leader also uses this pid until release_task * is called. Odd but simple and correct. */ - detach_pid(tsk, PIDTYPE_PID); tsk->pid = leader->pid; - attach_pid(tsk, PIDTYPE_PID, task_pid(leader)); + change_pid(tsk, PIDTYPE_PID, task_pid(leader)); transfer_pid(leader, tsk, PIDTYPE_PGID); transfer_pid(leader, tsk, PIDTYPE_SID); -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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