2 Mechanical chang es just to get your 2.4 driver
to build and load under the 2.6 kernel
The task of building and running your 2.4 unit tests under the 2.6 kernel won’t
take a lot of effort. Some to ols you will likely use in the process of executing
your port will be :
• Tags. If you don’t know how to use tags within VIM you HAVE to learn.
• Cscope
http://cscope.sourceforge.net/
For browsing a kernel tree
cscope -Rk
• An lxr web page
http://lxr.linux.no/
or
http://lxr.free-electrons.com/
• Bash shell, grep, find, editor, make, and the typical developer tools for
doing software development under Linux.
As an e xample starting point, I’m using the telecom clock driver. The following
URL is the posting of the 2.4.31 driver:
http://marc.theaimsgroup.com/?t=111945397900009&r=1&w=2
The easiest way to get started on your 2.4 to 2.6 port is to build your driver out
of tree. Save off the 2.4 driver source in an out of tree directory. For this tlclk
example, s ave off the LKML by posting to tlclk-2.4.31.patch and run
patch -p1 -f < tlclk-2.4.31.patch
to e xtract the starting source code for tlclk.c tlclk.h from the above posting.
Getting started is an easy thing to do when you use a trivial make file pointing
at a known good 2.6 build tree containing a vmlinux (running this kernel is
recommended but not required).
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