flashcache-dkms 3.1.1+git20131019-1: flashcache kernel module failed to build

don't know

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: flashcache-dkms 3.1.1+git20131019-1
ProcVersionSignature: Ubuntu 4.4.0-128.154~14.04.1-generic 4.4.131
Uname: Linux 4.4.0-128-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
DKMSKernelVersion: 4.4.0-128-generic
Date: Fri Jun 15 15:34:28 2018
DuplicateSignature: dkms:flashcache-dkms:3.1.1+git20131019-1:/var/lib/dkms/flashcache/3.1.1+git20131023/build/flashcache_conf.c:201:33: error: implicit declaration of function 'vmalloc' [-Werror=implicit-function-declaration]
InstallationDate: Installed on 2016-12-28 (534 days ago)
InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release amd64 (20160803)
PackageArchitecture: all
PackageVersion: 3.1.1+git20131019-1
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.8
 apt 1.0.1ubuntu2.18
SourcePackage: flashcache
Title: flashcache-dkms 3.1.1+git20131019-1: flashcache kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)