[syzbot] bpf-next build error (3)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    fddbf4b6 Merge branch 'bpf: Support calling kernel function'
git tree:       bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11e7a362d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7eff0f22b8563a5f
dashboard link: https://syzkaller.appspot.com/bug?extid=0b74d8ec3bf0cc4e4209

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0b74d8ec3bf0cc4e4209@xxxxxxxxxxxxxxxxxxxxxxxxx

net/ipv4/bpf_tcp_ca.c:209:28: error: expected identifier or '(' before ',' token

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.