+# 3.13 has vfs_renane with 5 args
+AC_DEFUN([LC_VFS_RENAME_5ARGS],
+[AC_MSG_CHECKING([if kernel has vfs_rename with 5 args])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+],[
+ vfs_rename(NULL, NULL, NULL, NULL, NULL);
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_VFS_RENAME_5ARGS, 1,
+ [kernel has vfs_rename with 5 args])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+