Comment 1 for bug 1470170

Syscall 370 is name_to_handle_at, and 355 is signalfd4. (Likely if name_to_handle_at succeeds then it'll want open_by_handle_at too.)

This patch implements the signalfd syscalls, though we haven't got to reviewing it yet.
http://patchwork.ozlabs.org/patch/478072/

It looks like systemd is coping with 370 not being implemented, so that might be enough to get it running.