Consolidate Linux poll implementation

This patch consolidates the poll Linux syscall implementation on
sysdeps/unix/sysv/linux/poll.c.  It basically removes poll from
auto-generation list and add a default implementation that either
call __NR_poll directly (if the kernel headers defines it) or
ppoll adjusting the timeout argument (as the generic implementation).

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.

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

1 files changed, 0 insertions, 42 deletions

diff --git a/sysdeps/unix/sysv/linux/generic/poll.c b/sysdeps/unix/sysv/linux/generic/poll.c
deleted file mode 100644
index c06d383e2c..0000000000
--- a/sysdeps/unix/sysv/linux/generic/poll.c
+++ /dev/null
@@ -1,42 +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 <errno.h>
-#include <sys/poll.h>
-
-#include <sysdep-cancel.h>
-#include <sys/syscall.h>
-
-int
-__poll (struct pollfd *fds, nfds_t nfds, int timeout)
-{
-  struct timespec timeout_ts;
-  struct timespec *timeout_ts_p = NULL;
-
-  if (timeout >= 0)
-    {
-      timeout_ts.tv_sec = timeout / 1000;
-      timeout_ts.tv_nsec = (timeout % 1000) * 1000000;
-      timeout_ts_p = &timeout_ts;
-    }
-
-  return SYSCALL_CANCEL (ppoll, fds, nfds, timeout_ts_p, NULL, 0);
-}
-libc_hidden_def (__poll)
-weak_alias (__poll, poll)
-strong_alias (__poll, __libc_poll)