[SD4L-user] Compiling on kernel 3.0.0.12

[Jonathan C. <jco...@ro...>]

When I tried to compile on kernel 3.0.0.12 (Ubuntu 11.10) I 
got the following error:

/lib/modules/3.0.0-12-generic/build/include/linux/bitops.h:22:24: 
fatal error: asm/bitops.h: No such file or directory

Searches in Synaptic led to the r-cran statistical package, 
but its installation didn't change anything.

What am I missing?