Why not add a C++ interface layer to the kernel to support C++ drivers?
The short answer is why bother, since there aren’t any C++ drivers for Linux. However, if you are bold enough to consider writing a driver in C++ and a support layer, be aware that this is unlikely to be well received in the community. Most of the kernel developers are unconvinced of the merits of C++ in general, and consider C++ to generate bloated code. Also, it would result in a confusing mix of C and C++ code in the kernel. Any C++ code in the kernel would be a second-class citizen, as it would be ignored by most kernel developers when changes to internal interfaces are made. A C++ support layer would be frequently be broken by such changes (as whoever is making the changes would probably not bother fixing the C++ code to match), and thus would require a strong commitment from someone to regularly maintain it.
