genirq: No need to check IRQTF_DIED before stopping a thread handler
Since 63706172f3
kthread_stop() is not
afraid of dead kernel threads. So no need to check if a thread is
alive before stopping it. These checks still were racy.
Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Link: http://lkml.kernel.org/r/20120309135939.GC2114@dhcp-26-207.brq.redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
parent
4bcdf1d0b6
commit
05d74efa3c
@ -1106,8 +1106,7 @@ out_thread:
|
||||
struct task_struct *t = new->thread;
|
||||
|
||||
new->thread = NULL;
|
||||
if (likely(!test_bit(IRQTF_DIED, &new->thread_flags)))
|
||||
kthread_stop(t);
|
||||
kthread_stop(t);
|
||||
put_task_struct(t);
|
||||
}
|
||||
out_mput:
|
||||
@ -1217,8 +1216,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
|
||||
#endif
|
||||
|
||||
if (action->thread) {
|
||||
if (!test_bit(IRQTF_DIED, &action->thread_flags))
|
||||
kthread_stop(action->thread);
|
||||
kthread_stop(action->thread);
|
||||
put_task_struct(action->thread);
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user