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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']

 

Bernado, could you save me some time please?

Originally, I thought you were proposing to patch some of the kernel
source. However, when I started work I quickly discovered the three
target files are in the bcmwl package and the kernel is untouched.

I have compared your proposed file 0006-add-support-for-
linux-3.8.0.patch with the original in my distributed copy from
bcmwl-6.20.155.1+bdcom. I can see your proposal is a "rolled up" patch
that includes the original distro change as well as your new one.

My problem is that I am not familiar enough with the package delivery
mechanism. Your patch file seems to compare git trees, but I am puzzled
by the fact that the distro has a "patches" subdirectory with that file
in it. If I replace the original patch file with your new copy and then
reinstall the package, will the patch be automatically applied (sounds
like magic to me!)... or is it just shipped as documentation?

I was all ready to rework your patches to apply them to the "src"
subdirectory when I realised my effort might not be necessary. Could you
advise me, please?

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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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