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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 <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2017-07-03 20:14:56 -04:00
parent e6c8adca20
commit 3ad6f93e98
9 changed files with 19 additions and 18 deletions
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2
drivers/vfio/virqfd.c
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@@ -46,7 +46,7 @@ static void virqfd_deactivate(struct virqfd *virqfd)
static int virqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void *key)
{
struct virqfd *virqfd = container_of(wait, struct virqfd, wait);
unsigned long flags = (unsigned long)key;
__poll_t flags = key_to_poll(key);
if (flags & POLLIN) {
/* An event has been signaled, call function */