Hardware Reference
In-Depth Information
Figure 2-11.
BCM2708 BSC driver enabled to be compiled-in to the kernel
It is almost never risky to enable something as a module (“M”), unless it is marked as
EXPERIMENTAL or DANGEROUS. However, it is rather risky to disable something that
is enabled in the default configuration. Unless you know what you are doing, you are
probably better off leaving all of the default settings alone.
That said, do not be overwhelmed by the sheer volume of configuration choices. Feel
free to explore by navigating through menus and reading the help entries. You just
might find something interesting.
When you're done configuring your kernel, return to the top-level menu and select
Exit. The TUI will prompt you to save your new configuration. It will exit and leave you
at a shell prompt, at which point you're ready to build the kernel image.
Build the Kernel Image
To speed up the build, you can parallelize the compilation by passing the
-j
flag to
make
. You'll need to know how many CPU cores are present on your build system to
determine the ideal value.
Hack #21
provides a longer explanation of this concept, but the basic formula we rec-
ommend trying is the number of CPU cores you have multiplied by 1.5. For example,
