[Click] git head compile error

[Xianghua Xiao]

make[1]: Entering directory `/home/xxiao/devel/misc/click/userlevel'
  CXX ../lib/master.cc
../lib/master.cc: In member function ‘void
Master::process_pending(RouterThread*)’:
../lib/master.cc:412: error: ‘click_master_mb’ was not declared in this scope
make[1]: *** [master.o] Error 1


I am new to Click, I found the newest linux kernel support is 2.6.24,
how hard is it to support newer kernel, say 2.6.35, is it just some
API changes(sorry I have not digged into the actual code yet)?

Thanks,
Xianghua