error installing bcmwl-kernel-source

[Stephan]

Binary package hint: bcmwl-kernel-source

Trying to (re)install bcmwl-kernel-source 5.100.82.38+bdcom-0ubuntu1 on Ubuntu 11.04 x86 via Synaptic => Error
/var/lib/dkms/bcmwl/5.100.82.38+bdcom/build/make.log contains:

DKMS make.log for bcmwl-5.100.82.38+bdcom for kernel 2.6.37-12-generic (i686)
So 9. Jan 12:23:42 CET 2011
make: Gehe in Verzeichnis '/usr/src/linux-headers-2.6.37-12-generic'
  LD /var/lib/dkms/bcmwl/5.100.82.38+bdcom/build/built-in.o
  CC [M] /var/lib/dkms/bcmwl/5.100.82.38+bdcom/build/src/shared/linux_osl.o
  CC [M] /var/lib/dkms/bcmwl/5.100.82.38+bdcom/build/src/wl/sys/wl_linux.o
/var/lib/dkms/bcmwl/5.100.82.38+bdcom/build/src/wl/sys/wl_linux.c: In function ‘wl_attach’:
/var/lib/dkms/bcmwl/5.100.82.38+bdcom/build/src/wl/sys/wl_linux.c:487:3: error: implicit declaration of function ‘init_MUTEX’
make[1]: *** [/var/lib/dkms/bcmwl/5.100.82.38+bdcom/build/src/wl/sys/wl_linux.o] Fehler 1
make: *** [_module_/var/lib/dkms/bcmwl/5.100.82.38+bdcom/build] Fehler 2
make: Verlasse Verzeichnis '/usr/src/linux-headers-2.6.37-12-generic'

WLAN didn't worked after an update yesterday.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: bcmwl-kernel-source (not installed)
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic i686
Architecture: i386
Date: Sun Jan 9 12:31:54 2011
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANGUAGE=de_AT:de_DE:de:en_GB:en
 LANG=de_DE.UTF-8
 LC_MESSAGES=de_AT.utf8
 SHELL=/bin/bash
SourcePackage: bcmwl-kernel-source

[Stephan (stephan-troyer)]

also affects kernel 2.6.37-9-generic - kernel 2.6.37-11-generic