eventpoll: abstract out ep_try_send_events() helper

In preparation for reusing this helper in another epoll setup helper,
abstract it out.

Signed-off-by: Jens Axboe <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Christian Brauner <[e-mail]>

fs/eventpoll.c

···
 	return ret;
 }
 
+static int ep_try_send_events(struct eventpoll *ep,
+			      struct epoll_event __user *events, int maxevents)
+{
+	int res;
+
+	/*
+	 * Try to transfer events to user space. In case we get 0 events and
+	 * there's still timeout left over, we go trying again in search of
+	 * more luck.
+	 */
+	res = ep_send_events(ep, events, maxevents);
+	if (res > 0)
+		ep_suspend_napi_irqs(ep);
+	return res;
+}
+
 /**
  * ep_poll - Retrieves ready events, and delivers them to the caller-supplied
  *           event buffer.
···
 
 	while (1) {
 		if (eavail) {
-			/*
-			 * Try to transfer events to user space. In case we get
-			 * 0 events and there's still timeout left over, we go
-			 * trying again in search of more luck.
-			 */
-			res = ep_send_events(ep, events, maxevents);
-			if (res) {
-				if (res > 0)
-					ep_suspend_napi_irqs(ep);
+			res = ep_try_send_events(ep, events, maxevents);
+			if (res)
 				return res;
-			}
 		}
 
 		if (timed_out)