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