I've noticed that sync_file_range is a stub on ppc/ppc64.
The kernel on these arches provides sync_file_range2 syscall with swapped
parameters.
The following completely untested patch ought to fix this.
Change last argument to unsigned int.
2007-04-01 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/sync_file_range.c (sync_file_range):
Change last argument to unsigned int.