Unverified Commit 38d20356 authored by Jens Axboe's avatar Jens Axboe Committed by Christian Brauner
Browse files

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: default avatarJens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20250219172552.1565603-3-axboe@kernel.dk


Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent 6b47d35d

fs/eventpoll.c

+18 −10
Original line number Diff line number Diff line
@@ -1980,6 +1980,22 @@ static int ep_autoremove_wake_function(struct wait_queue_entry *wq_entry, 
	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.
@@ -2031,18 +2047,10 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events, 


	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)

			return 0;