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[Bug 1156138] Re: bcmwl-kernel-source fails to build on lowlatency kernel [FATAL: modpost: GPL-incompatible module wl.ko uses GPL-only symbol '__rcu_read_unlock']

 

Thanks Bernardo. Your link was basically the same as where I had already
downloaded from.

Never having worked with it before, I am struggling to rapidly
understand the maintenance, packaging and build structures of ubuntu
dkms. I failed to find a patch file of the correct name, but I can now
see the content of what will become it within the bcmwl_6.30.223.30
+bdcom-0ubuntu3.diff file, so I have something to work with - even
though I don't actually have the patch file used during the dkms install
of the bcmwl module.

bcmwl_6.20.155 running under my generic kernel is the only way I can use
the wifi adapter at the moment. My low-latency and custom kernels are
installed on the same system and share the same package. I don't want to
risk breaking the only combination that currently works, and I can't see
a safe and easy way to have both versions of bcmwl on the same system. I
will stick with slow and painful source file comparisons for the moment
- unless you tell me a quicker way...

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https://bugs.launchpad.net/bugs/1156138

Title:
  bcmwl-kernel-source fails to build on lowlatency kernel [FATAL:
  modpost: GPL-incompatible module wl.ko uses GPL-only symbol
  '__rcu_read_unlock']

Status in “bcmwl” package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 13.04

  ProblemType: Package
  DistroRelease: Ubuntu 13.04
  Package: bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6
  ProcVersionSignature: Ubuntu 3.8.0-13.22-generic 3.8.3
  Uname: Linux 3.8.0-13-generic i686
  NonfreeKernelModules: wl
  ApportVersion: 2.9.1-0ubuntu1
  Architecture: i386
  DKMSKernelVersion: 3.8.0-12-lowlatency
  Date: Sat Mar 16 23:37:03 2013
  InstallationDate: Installed on 2013-01-03 (72 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
  MarkForUpload: True
  PackageVersion: 6.20.155.1+bdcom-0ubuntu6
  SourcePackage: bcmwl
  Title: bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6: bcmwl kernel module failed to build
  UpgradeStatus: Upgraded to raring on 2013-03-12 (4 days ago)

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