epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()

[pandora-kernel.git] / fs / eventpoll.c

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index aabdfc3..34bbfc6 100644 (file)
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -842,6 +842,10 @@ static int ep_poll_callback(wait_queue_t *wait, unsigned mode, int sync, void *k
        struct epitem *epi = ep_item_from_wait(wait);
        struct eventpoll *ep = epi->ep;
 
+       /* the caller holds eppoll_entry->whead->lock */
+       if ((unsigned long)key & POLLFREE)
+               list_del_init(&wait->task_list);
+
        spin_lock_irqsave(&ep->lock, flags);
 
        /*