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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1156138 ***
    https://bugs.launchpad.net/bugs/1156138

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 1156138, 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.


** This bug has been marked a duplicate of bug 1156138
   bcmwl-kernel-source fails to build on lowlatency kernel [FATAL: modpost: GPL-incompatible module wl.ko uses GPL-only symbol '__rcu_read_unlock']

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https://bugs.launchpad.net/bugs/1225720

Title:
  bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6: bcmwl kernel module
  failed to build

Status in “bcmwl” package in Ubuntu:
  New

Bug description:
  Trying to install linux-lowlatency package on a MacBookPro with ubuntu
  13.04, synaptic reports:

  run-parts: executing /etc/kernel/header_postinst.d/dkms 3.8.0-30-lowlatency /boot/vmlinuz-3.8.0-30-lowlatency
  Error! Bad return status for module build on kernel: 3.8.0-30-lowlatency (x86_64)
  Consult /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/make.log for more information.

  Looking at make.log says:

  DKMS make.log for bcmwl-6.20.155.1+bdcom for kernel 3.8.0-30-lowlatency (x86_64)
  Sun Sep 15 18:30:16 CEST 2013
  make: Entering directory `/usr/src/linux-headers-3.8.0-30-lowlatency'
  CFG80211 API is prefered for this kernel version
  Using CFG80211 API
    LD      /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/built-in.o
    CC [M]  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/shared/linux_osl.o
    CC [M]  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/wl/sys/wl_linux.o
    CC [M]  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/wl/sys/wl_iw.o
    CC [M]  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/wl/sys/wl_cfg80211.o
  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/wl/sys/wl_cfg80211.c:1578:2: warning: initialization from incompatible pointer type [enabled by default]
  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/wl/sys/wl_cfg80211.c:1578:2: warning: (near initialization for ‘wl_cfg80211_ops.set_tx_power’) [enabled by default]
  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/wl/sys/wl_cfg80211.c:1579:2: warning: initialization from incompatible pointer type [enabled by default]
  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/src/wl/sys/wl_cfg80211.c:1579:2: warning: (near initialization for ‘wl_cfg80211_ops.get_tx_power’) [enabled by default]
    LD [M]  /var/lib/dkms/bcmwl/6.20.155.1+bdcom/build/wl.o
    Building modules, stage 2.
  CFG80211 API is prefered for this kernel version
  Using CFG80211 API
    MODPOST 1 modules
  FATAL: modpost: GPL-incompatible module wl.ko uses GPL-only symbol '__rcu_read_unlock'
  make[1]: *** [__modpost] Error 1
  make: *** [modules] Error 2
  make: Leaving directory `/usr/src/linux-headers-3.8.0-30-lowlatency'

  So apparently this is the culprit on the lowlatency kernel:

  FATAL: modpost: GPL-incompatible module wl.ko uses GPL-only symbol
  '__rcu_read_unlock'

  best,
  -mario

  ProblemType: Package
  DistroRelease: Ubuntu 13.04
  Package: bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6
  ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
  Uname: Linux 3.8.0-31-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.9.2-0ubuntu8.4
  Architecture: amd64
  DKMSKernelVersion: 3.8.0-30-lowlatency
  Date: Sun Sep 15 18:29:36 2013
  InstallationDate: Installed on 2012-04-23 (510 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64+mac (20120421)
  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 2013-04-30 (138 days ago)

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