Consolidate Linux writev implementation

This patch consolidates the writev Linux syscall implementation on
sysdeps/unix/sysv/linux/writev.c.

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/writev.c: New file.

2 files changed, 29 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 3bf0aa1135..ca3105707f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2016-05-10  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* sysdeps/unix/sysv/linux/writev.c: New file.
+
 	* sysdeps/unix/sysv/linux/readv.c: New file.
 
 	* include/unistd.h (write): Add hidden proto.
diff --git a/sysdeps/unix/sysv/linux/writev.c b/sysdeps/unix/sysv/linux/writev.c
new file mode 100644
index 0000000000..1b56cbb709
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/writev.c
@@ -0,0 +1,27 @@
+/* Linux writev syscall implementation.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <unistd.h>
+#include <sysdep-cancel.h>
+
+ssize_t
+__writev (int fd, const struct iovec *iov, int iovcnt)
+{
+  return SYSCALL_CANCEL (writev, fd, iov, iovcnt);
+}
+weak_alias (__writev, writev)