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annotate poll-related wait keys

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__poll_t is also used as wait key in some waitqueues.
Verify that wait_..._poll() gets __poll_t as key and
provide a helper for wakeup functions to get back to
that __poll_t value.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2017-07-03 20:14:56 -04:00
commit 3ad6f93e98
9 changed files with 19 additions and 18 deletions
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2
mm/memcontrol.c
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@ -3777,7 +3777,7 @@ static int memcg_event_wake(wait_queue_entry_t *wait, unsigned mode,
struct mem_cgroup_event *event =
container_of(wait, struct mem_cgroup_event, wait);
struct mem_cgroup *memcg = event->memcg;
unsigned long flags = (unsigned long)key;
__poll_t flags = key_to_poll(key);
if (flags & POLLHUP) {
/*