From: Al Viro Date: Wed, 29 Nov 2017 00:56:15 +0000 (-0500) Subject: eventpoll: no need to mask the result of epi_item_poll() again X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=69112736e2f025ff3ba280cf81c36e25cf7cc59f;p=openwrt%2Fstaging%2Fblogic.git eventpoll: no need to mask the result of epi_item_poll() again two callers that do so don't need to bother - we'd already masked it with epi->event.events, which * couldn't have changed since we are holding ->mtx * had been set to event->events * is still equal to event->events, since *event is never changed by anything. Signed-off-by: Al Viro --- diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 92f6c30a1dbb..42e35a6977c9 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1488,7 +1488,7 @@ static int ep_insert(struct eventpoll *ep, const 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); @@ -1546,7 +1546,6 @@ 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); @@ -1588,14 +1587,10 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, /* * 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);