[PATCH 07/13] posix: Consolidate Linux fdatasync syscall

[Adhemerval Zanella]

This patch consolidates the fdatasync Linux syscall generation on
sysdeps/unix/sysv/linux/fdatasync.c.  It basically removes it from
architectures auto-generation list.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu,
sparc64-linux-gnu, and sparcv9-linux-gnu.

	* misc/makefile (CFLAGS-datasync.c): New flag.
	* nptl/makefile (CFLAGS-datasync.c): Likewise.
	* sysdeps/unix/sysv/linux/syscalls.list (fdatasync): Remove from
	auto-generation syscall list.
	* sysdeps/unix/sysv/linux/fdatasync.c: New file.
---
 ChangeLog                             |  6 ++++++
 misc/Makefile                         |  1 +
 nptl/Makefile                         |  1 +
 sysdeps/unix/sysv/linux/fdatasync.c   | 29 +++++++++++++++++++++++++++++
 sysdeps/unix/sysv/linux/syscalls.list |  1 -
 5 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 sysdeps/unix/sysv/linux/fdatasync.c

diff --git a/misc/Makefile b/misc/Makefile
index 8536255..2f1ddef 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -109,6 +109,7 @@ CFLAGS-getusershell.c = -fexceptions
 CFLAGS-err.c = -fexceptions
 CFLAGS-tst-tsearch.c = $(stack-align-test-flags)
 CFLAGS-msync.c = -fexceptions
+CFLAGS-fdatasync.c = -fexceptions
 
 # Called during static library initialization, so turn stack-protection
 # off for non-shared builds.
diff --git a/nptl/Makefile b/nptl/Makefile
index 875ab3d..879efbb 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -218,6 +218,7 @@ CFLAGS-read.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-write.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-nanosleep.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-msync.c = -fexceptions -fasynchronous-unwind-tables
+CFLAGS-fdatasync.c = -fexceptions -fasynchronous-unwind-tables
 
 CFLAGS-pt-system.c = -fexceptions
 
diff --git a/sysdeps/unix/sysv/linux/fdatasync.c b/sysdeps/unix/sysv/linux/fdatasync.c
new file mode 100644
index 0000000..09a07fb
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/fdatasync.c
@@ -0,0 +1,29 @@
+/* Synchronize a file's in-core state with storage device Linux
+   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>
+
+/* Synchronize at least the data part of a file with the underlying
+   media.  */
+int
+fdatasync (int fd)
+{
+  return SYSCALL_CANCEL (fdatasync, fd);
+}
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index ae99acd..c69eff4 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -13,7 +13,6 @@ epoll_create1	EXTRA	epoll_create1	i:i	epoll_create1
 epoll_ctl	EXTRA	epoll_ctl	i:iiip	epoll_ctl
 eventfd		EXTRA	eventfd2	i:ii	eventfd
 execve		-	execve		i:spp	__execve	execve
-fdatasync	-	fdatasync	Ci:i	fdatasync
 flock		-	flock		i:ii	__flock		flock
 get_kernel_syms	EXTRA	get_kernel_syms	i:p	__compat_get_kernel_syms	get_kernel_syms@GLIBC_2.0:GLIBC_2.23
 getpid          -       getpid          Ei:     __getpid        getpid
-- 
2.7.4