BBB Linux RT patch

I’m having an issue building modules using the rt linux patch. When I try to build it, it says it can’t find some of the headers files for the patch (i.e. rtl.h). And when I look for the header files, they don’t exists. I was using this link to give me direction on how to use the patch. Note that I am using the v4.1.24-bone-rt-r21 branch. I also did make sure I was building with the fully preemptive option when I built the kernel.

yeah, that link is for "RTLinux" made by Wind River and it died in 2011:



rt = RT_PREEMPT enabled..