fs: annotate ->poll() instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c
index 1ee54ff..7edbd06 100644
--- a/fs/cachefiles/daemon.c
+++ b/fs/cachefiles/daemon.c
@@ -31,7 +31,7 @@ static ssize_t cachefiles_daemon_read(struct file *, char __user *, size_t,
 				      loff_t *);
 static ssize_t cachefiles_daemon_write(struct file *, const char __user *,
 				       size_t, loff_t *);
-static unsigned int cachefiles_daemon_poll(struct file *,
+static __poll_t cachefiles_daemon_poll(struct file *,
 					   struct poll_table_struct *);
 static int cachefiles_daemon_frun(struct cachefiles_cache *, char *);
 static int cachefiles_daemon_fcull(struct cachefiles_cache *, char *);
@@ -291,11 +291,11 @@ static ssize_t cachefiles_daemon_write(struct file *file,
  * poll for culling state
  * - use POLLOUT to indicate culling state
  */
-static unsigned int cachefiles_daemon_poll(struct file *file,
+static __poll_t cachefiles_daemon_poll(struct file *file,
 					   struct poll_table_struct *poll)
 {
 	struct cachefiles_cache *cache = file->private_data;
-	unsigned int mask;
+	__poll_t mask;
 
 	poll_wait(file, &cache->daemon_pollwq, poll);
 	mask = 0;