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Commit 3cfd0885 authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
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[PATCH] tty: stop the tty vanishing under procfs access 



Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 808a0d38

fs/proc/array.c

+3 −0
Original line number Diff line number Diff line
@@ -347,6 +347,8 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole) 
	sigemptyset(&sigign);

	sigemptyset(&sigcatch);

	cutime = cstime = utime = stime = cputime_zero;



	mutex_lock(&tty_mutex);

	read_lock(&tasklist_lock);

	if (task->sighand) {

		spin_lock_irq(&task->sighand->siglock);
@@ -388,6 +390,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole) 
	}

	ppid = pid_alive(task) ? task->group_leader->real_parent->tgid : 0;

	read_unlock(&tasklist_lock);

	mutex_unlock(&tty_mutex);



	if (!whole || num_threads<2)

		wchan = get_wchan(task);