bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu0.2: bcmwl kernel module failed to build [error: implicit declaration of function ‘init_timer’; did you mean ‘init_timers’?]

[Urban HUB]

<pre>modprobe: ERROR: could not insert &apos;wl&apos;: Required key not available
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.130ubuntu3) ...
update-initramfs: Generating /boot/initrd.img-4.15.0-20-generic
</pre>

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu4
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
DKMSKernelVersion: 4.15.0-20-generic
Date: Mon May 14 15:38:27 2018
DuplicateSignature: dkms:bcmwl-kernel-source:6.30.223.248+bdcom-0ubuntu0.2:/var/lib/dkms/bcmwl/6.30.223.248+bdcom/build/src/wl/sys/wl_linux.c:2358:2: error: implicit declaration of function ‘init_timer’; did you mean ‘init_timers’? [-Werror=implicit-function-declaration]
InstallationDate: Installed on 2018-05-09 (4 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageVersion: 6.30.223.248+bdcom-0ubuntu0.2
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: bcmwl
Title: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu0.2: bcmwl kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1757008, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.