annotate ep_scan_ready_list()

make it always return __poll_t and have its callbacks do the same

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 13 insertions, 11 deletions

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 87452875eaec..d1a490c7e6c3 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -661,12 +661,13 @@ static inline void ep_pm_stay_awake_rcu(struct epitem *epi)
  *
  * Returns: The same integer error code returned by the @sproc callback.
  */
-static int ep_scan_ready_list(struct eventpoll *ep,
-                              int (*sproc)(struct eventpoll *,
+static __poll_t ep_scan_ready_list(struct eventpoll *ep,
+                              __poll_t (*sproc)(struct eventpoll *,
                                            struct list_head *, void *),
                               void *priv, int depth, bool ep_locked)
 {
-        int error, pwake = 0;
+        __poll_t res;
+        int pwake = 0;
         unsigned long flags;
         struct epitem *epi, *nepi;
         LIST_HEAD(txlist);
@@ -695,7 +696,7 @@ static int ep_scan_ready_list(struct eventpoll *ep,
         /*
          * Now call the callback function.
          */
-        error = (*sproc)(ep, &txlist, priv);
+        res = (*sproc)(ep, &txlist, priv);
 
         spin_lock_irqsave(&ep->lock, flags);
         /*
@@ -748,7 +749,7 @@ static int ep_scan_ready_list(struct eventpoll *ep,
         if (pwake)
                 ep_poll_safewake(&ep->poll_wait);
 
-        return error;
+        return res;
 }
 
 static void epi_rcu_free(struct rcu_head *head)
@@ -865,7 +866,7 @@ static int ep_eventpoll_release(struct inode *inode, struct file *file)
         return 0;
 }
 
-static int ep_read_events_proc(struct eventpoll *ep, struct list_head *head,
+static __poll_t ep_read_events_proc(struct eventpoll *ep, struct list_head *head,
                                void *priv);
 static void ep_ptable_queue_proc(struct file *file, wait_queue_head_t *whead,
                                  poll_table *pt);
@@ -875,7 +876,7 @@ 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(const struct epitem *epi, poll_table *pt,
+static __poll_t ep_item_poll(const struct epitem *epi, poll_table *pt,
                                  int depth)
 {
         struct eventpoll *ep;
@@ -895,7 +896,7 @@ static unsigned int ep_item_poll(const struct epitem *epi, poll_table *pt,
                                   locked) & epi->event.events;
 }
 
-static int ep_read_events_proc(struct eventpoll *ep, struct list_head *head,
+static __poll_t ep_read_events_proc(struct eventpoll *ep, struct list_head *head,
                                void *priv)
 {
         struct epitem *epi, *tmp;
@@ -1415,7 +1416,8 @@ static noinline void ep_destroy_wakeup_source(struct epitem *epi)
 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;
+        int error, pwake = 0;
+        __poll_t revents;
         unsigned long flags;
         long user_watches;
         struct epitem *epi;
@@ -1613,11 +1615,11 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi,
         return 0;
 }
 
-static int ep_send_events_proc(struct eventpoll *ep, struct list_head *head,
+static __poll_t ep_send_events_proc(struct eventpoll *ep, struct list_head *head,
                                void *priv)
 {
         struct ep_send_events_data *esed = priv;
-        unsigned int revents;
+        __poll_t revents;
         struct epitem *epi;
         struct epoll_event __user *uevent;
         struct wakeup_source *ws;