[Feature][T106]ZXW P56U09 code

Only Configure: Yes
Affected branch: master
Affected module: unknow
Is it affected on both ZXIC and MTK: only ZXIC
Self-test: No
Doc Update: No

Change-Id: I3cbd8b420271eb20c2b40ebe5c78f83059cd42f3
diff --git a/ap/build/uClibc/libc/sysdeps/linux/common/fdatasync.c b/ap/build/uClibc/libc/sysdeps/linux/common/fdatasync.c
new file mode 100644
index 0000000..e51c723
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/common/fdatasync.c
@@ -0,0 +1,43 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * fdatasync() for uClibc
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#if !defined __NR_fdatasync && defined __NR_osf_fdatasync
+# define __NR_fdatasync __NR_osf_fdatasync
+#endif
+
+#ifdef __NR_fdatasync
+
+# ifdef __UCLIBC_HAS_THREADS_NATIVE__
+# include <sysdep-cancel.h>
+# else
+# define SINGLE_THREAD_P 1
+# endif
+
+#define __NR___syscall_fdatasync __NR_fdatasync
+
+static __always_inline
+_syscall1(int, __syscall_fdatasync, int, fd)
+
+int fdatasync(int fd)
+{
+	if (SINGLE_THREAD_P)
+		return __syscall_fdatasync(fd);
+
+# ifdef __UCLIBC_HAS_THREADS_NATIVE__
+	int oldtype = LIBC_CANCEL_ASYNC ();
+	int result = __syscall_fdatasync(fd);
+	LIBC_CANCEL_RESET (oldtype);
+	return result;
+# endif
+}
+
+#endif