Consolidate Linux epoll_wait syscall

This patch consolidates the epoll_wait Linux syscall generation on
sysdeps/unix/sysv/linux/epoll_wait.c.  The implementation tries to
use __NR_epoll_wait if defined, otherwise calls epoll_pwait.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.

	* sysdeps/unix/sysv/linux/epoll_wait.c: New file.
	* sysdeps/unix/sysv/linux/generic/epoll_wait.c: Remove file.
	* sysdeps/unix/sysv/linux/syscalls.list: Remove epoll_wait from
	auto-generation list.

2 files changed, 1 insertions, 29 deletions

diff --git a/sysdeps/unix/sysv/linux/generic/Makefile b/sysdeps/unix/sysv/linux/generic/Makefile
index c1daee2396..7e27e79772 100644
--- a/sysdeps/unix/sysv/linux/generic/Makefile
+++ b/sysdeps/unix/sysv/linux/generic/Makefile
@@ -1,3 +1,3 @@
 ifeq ($(subdir),misc)
-sysdep_routines += epoll_create epoll_wait inotify_init
+sysdep_routines += epoll_create inotify_init
 endif
diff --git a/sysdeps/unix/sysv/linux/generic/epoll_wait.c b/sysdeps/unix/sysv/linux/generic/epoll_wait.c
deleted file mode 100644
index d9363f1d8d..0000000000
--- a/sysdeps/unix/sysv/linux/generic/epoll_wait.c
+++ /dev/null
@@ -1,28 +0,0 @@
-/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <stddef.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/epoll.h>
-
-int
-epoll_wait (int epfd, struct epoll_event *events, int maxevents, int timeout)
-{
-  return epoll_pwait (epfd, events, maxevents, timeout, NULL);
-}