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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>
hifive-unleashed-5.1
Al Viro 2018-02-01 15:24:58 -05:00
parent d7ebbe46f4
commit d85e2aa2e3
1 changed files with 13 additions and 11 deletions
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24
fs/eventpoll.c
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@ -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;