Recent vm changes brought in a new function which the core procfs code
utilizes.  So implement it for nommu systems too to avoid link failures.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Tested-by: NSimon Horman <horms@verge.net.au>
Tested-by: NIthamar Adema <ithamar.adema@team-embedded.nl>
Acked-by: NGreg Ungerer <gerg@uclinux.org>