util: epoll: rename revent to read event

A bit more readable and will be easy to distinguish from upcoming
hevent^Whangup_event.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

criu/include/util.h

@@ -322,7 +322,13 @@ int setup_tcp_client(char *addr);
 
 struct epoll_rfd {
 	int fd;
-	int (*revent)(struct epoll_rfd *);
+	/*
+	 * EPOLLIN notification. The data is available for read in
+	 * rfd->fd.
+	 * @return 0 to resume polling, 1 to stop polling or a
+	 * negative error code
+	 */
+	int (*read_event)(struct epoll_rfd *);
 };
 
 extern int epoll_add_rfd(int epfd, struct epoll_rfd *);

criu/page-xfer.c

@@ -1199,7 +1199,7 @@ int connect_to_page_server_to_recv(int epfd)
 		return -1;
 
 	ps_rfd.fd = page_server_sk;
-	ps_rfd.revent = page_server_async_read;
+	ps_rfd.read_event = page_server_async_read;
 
 	return epoll_add_rfd(epfd, &ps_rfd);
 }

criu/uffd.c

@@ -114,7 +114,7 @@ static struct lazy_pages_info *lpi_init(void)
 	INIT_LIST_HEAD(&lpi->iovs);
 	INIT_LIST_HEAD(&lpi->reqs);
 	INIT_LIST_HEAD(&lpi->l);
-	lpi->lpfd.revent = handle_uffd_event;
+	lpi->lpfd.read_event = handle_uffd_event;
 
 	return lpi;
 }

criu/util.c

@@ -1312,7 +1312,7 @@ int epoll_run_rfds(int epollfd, struct epoll_event *evs, int nr_fds, int timeout
 			struct epoll_rfd *rfd;
 
 			rfd = (struct epoll_rfd *)evs[i].data.ptr;
-			ret = rfd->revent(rfd);
+			ret = rfd->read_event(rfd);
 			if (ret < 0)
 				goto out;
 			if (ret > 0)