Hi Michael, What would you do with the prototypes in outb.2? They are different in glibc and the kernel. However, since these are functions to be called mostly withing the kernel, the kernel prototype is more important. Would you use the glibc one in SYNOPSIS, and then a C library / kernel differences with the kernel prototypes? Thanks, Alex -- Alejandro Colomar Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/ http://www.alejandro-colomar.es/