unshare syscall

Felix et al. -

Could someone drop the following three lines into syscalls.s/unshare.S ?
#include "syscalls.h"

syscall(unshare,unshare)

I can confirm it works as intended on x86_64.
Pretty magic build system, if you ask me.

  - Larry

P.S.  Is an archive of this mailing list kept anywhere searchable?
I have no clue if this topic has come up before.  I see instructions
for how to retrieve a numbered message, but that doesn't help me answer
my question.