diff options
Diffstat (limited to 'fs/eventpoll.c')
| -rw-r--r-- | fs/eventpoll.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index afd548ebc328..42e35a6977c9 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -874,7 +874,8 @@ static void ep_ptable_queue_proc(struct file *file, wait_queue_head_t *whead, * the ep->mtx so we need to start from depth=1, such that mutex_lock_nested() * is correctly annotated. */ -static unsigned int ep_item_poll(struct epitem *epi, poll_table *pt, int depth) +static unsigned int ep_item_poll(const struct epitem *epi, poll_table *pt, + int depth) { struct eventpoll *ep; bool locked; @@ -920,7 +921,7 @@ static int ep_read_events_proc(struct eventpoll *ep, struct list_head *head, return 0; } -static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait) +static __poll_t ep_eventpoll_poll(struct file *file, poll_table *wait) { struct eventpoll *ep = file->private_data; int depth = 0; @@ -1117,6 +1118,7 @@ static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, v unsigned long flags; struct epitem *epi = ep_item_from_wait(wait); struct eventpoll *ep = epi->ep; + __poll_t pollflags = key_to_poll(key); int ewake = 0; spin_lock_irqsave(&ep->lock, flags); @@ -1138,7 +1140,7 @@ static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, v * callback. We need to be able to handle both cases here, hence the * test for "key" != NULL before the event match test. */ - if (key && !((unsigned long) key & epi->event.events)) + if (pollflags && !(pollflags & epi->event.events)) goto out_unlock; /* @@ -1175,8 +1177,8 @@ static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, v */ if (waitqueue_active(&ep->wq)) { if ((epi->event.events & EPOLLEXCLUSIVE) && - !((unsigned long)key & POLLFREE)) { - switch ((unsigned long)key & EPOLLINOUT_BITS) { + !(pollflags & POLLFREE)) { + switch (pollflags & EPOLLINOUT_BITS) { case POLLIN: if (epi->event.events & POLLIN) ewake = 1; @@ -1205,7 +1207,7 @@ out_unlock: if (!(epi->event.events & EPOLLEXCLUSIVE)) ewake = 1; - if ((unsigned long)key & POLLFREE) { + if (pollflags & POLLFREE) { /* * If we race with ep_remove_wait_queue() it can miss * ->whead = NULL and do another remove_wait_queue() after @@ -1409,7 +1411,7 @@ static noinline void ep_destroy_wakeup_source(struct epitem *epi) /* * Must be called with "mtx" held. */ -static int ep_insert(struct eventpoll *ep, struct epoll_event *event, +static int ep_insert(struct eventpoll *ep, const struct epoll_event *event, struct file *tfile, int fd, int full_check) { int error, revents, pwake = 0; @@ -1486,7 +1488,7 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event, ep_set_busy_poll_napi_id(epi); /* If the file is already "ready" we drop it inside the ready list */ - if ((revents & event->events) && !ep_is_linked(&epi->rdllink)) { + if (revents && !ep_is_linked(&epi->rdllink)) { list_add_tail(&epi->rdllink, &ep->rdllist); ep_pm_stay_awake(epi); @@ -1540,10 +1542,10 @@ error_create_wakeup_source: * Modify the interest event mask by dropping an event if the new mask * has a match in the current file status. Must be called with "mtx" held. */ -static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_event *event) +static int ep_modify(struct eventpoll *ep, struct epitem *epi, + const struct epoll_event *event) { int pwake = 0; - unsigned int revents; poll_table pt; init_poll_funcptr(&pt, NULL); @@ -1585,14 +1587,10 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even /* * Get current event bits. We can safely use the file* here because * its usage count has been increased by the caller of this function. - */ - revents = ep_item_poll(epi, &pt, 1); - - /* * If the item is "hot" and it is not registered inside the ready * list, push it inside. */ - if (revents & event->events) { + if (ep_item_poll(epi, &pt, 1)) { spin_lock_irq(&ep->lock); if (!ep_is_linked(&epi->rdllink)) { list_add_tail(&epi->rdllink, &ep->rdllist); |