+#endif
+
+#ifndef CONFIG_SYNC_FILE_RANGE
+int sync_file_range(int fd, off64_t offset, off64_t nbytes, unsigned int flags)
+{
+ errno = ENOSYS;
+ return -1;
+}
+#endif
+
+#ifndef CONFIG_POSIX_FADVISE
+int posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+ return 0;
+}
+#endif