mm: always print RLIMIT_DATA warning

mm: always print RLIMIT_DATA warning

The documentation for ignore_rlimit_data says that it will print a
warning at first misuse.  Yet it doesn't seem to do that.

Fix the code to print the warning even when we allow the process to
continue.

Link: http://lkml.kernel.org/r/1517935505-9321-1-git-send-email-dwmw@amazon.co.uk
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Acked-by: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>