On Thu, Jan 18, 2018 at 07:37:49PM +0000, Al Viro wrote:

From: Al Viro <viro@zeniv.linux.org.uk>

it's been equivalent to sock_do_ioctl() since 2009...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Note that we have two different dev_ifsioc() defintions, which
is a little weird.

But the net/socket.c one does indeed seem superflous as there is no
point in doing the compat_alloc_user_space / copy_in_user as far
as I can tell.  compat_ifreq differs from ifreq in the size of
ifru_data, but it seems none of these ioctls actually use it.

A better changelog would be nice, though.