From: Ulrich Drepper <drepper <at> redhat.com>
Date: Tue, 20 Nov 2007 01:53:14 -0500

FWIW, I think this indirect syscall stuff is the most ugly interface
I've ever seen proposed for the kernel.

And I agree with all of the objections raised by both H. Pater Anvin
and Eric Dumazet.

> This patch adds support for setting the O_NONBLOCK flag of the file
> descriptors returned by socket, socketpair, and accept.
 ...
> -	err = sock_attach_fd(sock1, newfile1);
> +	err = sock_attach_fd(sock1, newfile1,
> +			     INDIRECT_PARAM(file_flags, flags));

Where does this INDIRECT_PARAM() macro get defined?  I do not
see it being defined anywhere in these patches.