Drop ports_valid flag, it just wastes a register
-rw-r--r-- 3489 README.md
-rwxr-xr-x 1278 dropcount.sh
-rwxr-xr-x 23555 genrules.py
-rwxr-xr-x 1467 install.sh
-rwxr-xr-x 26845 test.sh
-rw-r--r-- 10129 xdp.c