bcmwl-kernel-source 5.100.82.38+bdcom-0ubuntu6.1: bcmwl kernel module failed to build after upgrading to backported quantal kernel (3.5)

Upgraded precise to backported quantal kernel. Installation warned that bcmwl modules is not built successfully which boot confirmes - no wlan after boot using kernel:

Linux DELL-M4500 3.5.0-21-generic #32~precise1-Ubuntu SMP Thu Dec 13 20:26:47 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: bcmwl-kernel-source 5.100.82.38+bdcom-0ubuntu6.1
ProcVersionSignature: Ubuntu 3.5.0-21.32~precise1-generic 3.5.7.1
Uname: Linux 3.5.0-21-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
DKMSKernelVersion: 3.5.0-21-generic
Date: Sat Jan 12 23:15:46 2013
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
PackageVersion: 5.100.82.38+bdcom-0ubuntu6.1
SourcePackage: bcmwl
Title: bcmwl-kernel-source 5.100.82.38+bdcom-0ubuntu6.1: bcmwl kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)