Relocate alpha from ports to libc

Also fixed the following whitespace nits to satisfy the push:

sysdeps/alpha/alphaev6/memset.S:142: space before tab in indent.
sysdeps/alpha/configure:1: new blank line at EOF.
sysdeps/alpha/fpu/e_sqrt.c:126: space before tab in indent.
sysdeps/alpha/preconfigure:1: new blank line at EOF.
sysdeps/unix/sysv/linux/alpha/syscalls.list:1: new blank line at EOF.

1 files changed, 64 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/fdatasync.c b/sysdeps/unix/sysv/linux/alpha/fdatasync.c
new file mode 100644
index 0000000000..747696125b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/fdatasync.c
@@ -0,0 +1,64 @@
+/* fdatasync -- synchronize at least the data part of a file with
+   the underlying media. Linux version.
+
+   Copyright (C) 2007-2014 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 <errno.h>
+#include <unistd.h>
+
+#include <sysdep-cancel.h>
+#include <sys/syscall.h>
+
+#include <kernel-features.h>
+
+static int
+do_fdatasync (int fd)
+{
+#ifdef __ASSUME_FDATASYNC
+  return INLINE_SYSCALL (fdatasync, 1, fd);
+#elif defined __NR_fdatasync
+  static int __have_no_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)