2009-07-25  Aurelien Jarno  <aurelien@aurel32.net>

	* sysdeps/unix/sysv/linux/kernel-features.h: define 

	__ASSUME_FDATASYNC. 

	* sysdeps/unix/sysv/linux/fdatasync.c: New file.

	* sysdeps/unix/sysv/linux/Makefile: compile fdatasync.c with

	-fexceptions.

	* sysdeps/unix/sysv/linux/syscalls.list: Remove fdatasync.

 sysdeps/unix/sysv/linux/Makefile          |    1 

 sysdeps/unix/sysv/linux/fdatasync.c       |   69 ++++++++++++++++++++++++++++++

 sysdeps/unix/sysv/linux/kernel-features.h |    6 ++

 sysdeps/unix/sysv/linux/syscalls.list     |    1 

 4 files changed, 76 insertions(+), 1 deletion(-)

diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/Makefile glibc-2.12.1/sysdeps/unix/sysv/linux/Makefile

--- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/Makefile	2009-03-02 17:15:13.000000000 +0100

+++ glibc-2.12.1/sysdeps/unix/sysv/linux/Makefile	2009-11-13 00:51:04.000000000 +0100

@@ -20,6 +20,7 @@

 		   setfsuid setfsgid makedev epoll_pwait signalfd \

 		   eventfd eventfd_read eventfd_write

+CFLAGS-fdatasync.c = -fexceptions

 CFLAGS-gethostid.c = -fexceptions

 sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \

diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/fdatasync.c glibc-2.12.1/sysdeps/unix/sysv/linux/fdatasync.c

--- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/fdatasync.c	1970-01-01 01:00:00.000000000 +0100

+++ glibc-2.12.1/sysdeps/unix/sysv/linux/fdatasync.c	2009-11-13 00:51:04.000000000 +0100

@@ -0,0 +1,69 @@

+/* fdatasync -- synchronize at least the data part of a file with 

+   the underlying media. Linux version. 

+

+   Copyright (C) 2007 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, write to the Free

+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

+   02111-1307 USA.  */

+

+#include <errno.h>

+#include <unistd.h>

+

+#include <sysdep-cancel.h>

+#include <sys/syscall.h>

+#include <bp-checks.h>

+

+#include <kernel-features.h>

+

+#if defined __NR_fdatasync && !defined __ASSUME_FDATASYNC

+static int __have_no_fdatasync;

+#endif

+

+static int

+do_fdatasync (int fd)

+{

+#ifdef __ASSUME_FDATASYNC

+  return INLINE_SYSCALL (fdatasync, 1, fd);

+#elif defined __NR_fdatasync

+  if (!__builtin_expect (__have_no_fdatasync, 0))

+    {

+      int result = INLINE_SYSCALL (fdatasync, 1, fd);

+      if (__builtin_expect (result, 0) != -1 || errno != ENOSYS)

+	return result;

+

+      __have_no_fdatasync = 1;

+    }

+#endif

+  return INLINE_SYSCALL (fsync, 1, fd);

+}

+

+int

+__fdatasync (int fd)

+{

+  if (SINGLE_THREAD_P)

+    return do_fdatasync (fd);

+

+  int oldtype = LIBC_CANCEL_ASYNC ();

+

+  int result = do_fdatasync (fd);

+

+  LIBC_CANCEL_RESET (oldtype);

+

+  return result;

+}

+

+weak_alias (__fdatasync, fdatasync)

+

diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/kernel-features.h glibc-2.12.1/sysdeps/unix/sysv/linux/kernel-features.h

--- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/kernel-features.h	2009-11-13 00:50:45.000000000 +0100

+++ glibc-2.12.1/sysdeps/unix/sysv/linux/kernel-features.h	2009-11-13 00:51:04.000000000 +0100

@@ -459,6 +459,12 @@

 # define __ASSUME_FUTEX_LOCK_PI	1

 #endif

+/* Support for fsyncdata syscall was added in 2.6.22 on alpha, but it

+   was already present in 2.0 kernels on other architectures.  */

+#if (!defined __alpha || __LINUX_KERNEL_VERSION >= 0x020616)

+# define __ASSUME_FDATASYNC	1

+#endif

+

 /* Support for utimensat syscall was added in 2.6.22, on SH

    only after 2.6.22-rc1.  */

 #if __LINUX_KERNEL_VERSION >= 0x020616 \

diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/syscalls.list glibc-2.12.1/sysdeps/unix/sysv/linux/syscalls.list

--- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/syscalls.list	2008-08-02 01:29:08.000000000 +0200

+++ glibc-2.12.1/sysdeps/unix/sysv/linux/syscalls.list	2009-11-13 00:51:04.000000000 +0100

@@ -11,7 +11,6 @@

 epoll_create1	EXTRA	epoll_create1	i:i	epoll_create1

 epoll_ctl	EXTRA	epoll_ctl	i:iiip	epoll_ctl

 epoll_wait	EXTRA	epoll_wait	Ci:ipii	epoll_wait

-fdatasync	-	fdatasync	Ci:i	fdatasync

 flock		-	flock		i:ii	__flock		flock

 fork		-	fork		i:	__libc_fork	__fork fork

 get_kernel_syms	EXTRA	get_kernel_syms	i:p	get_kernel_syms