Mathieu JOINIE-MAURIN wrote: > Hi, > > I need to use a sqrt() function in a kernel module code. I am a beginner with Xenomai. Is there any math_module which already exists ? Counter question: Why do you need to use math in kernel code? It is generally a sign something is not well split-up between kernel-based driver code and user-space RT applications. To answer your question: No, Xenomai does not come with a kernel math lib because there is not much use for it - generally. Porting the app to user-space is recommended. Jan