/usr/src/linux-source-3.13.0/debian.master/abi/3.13.0-148.197/arm64/generic.retpoline is in linux-source-3.13.0 3.13.0-149.199.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | # RETPOLINE NOT ENABLED
|