On Mon, 24 Aug 2020 16:42:01 +0300 Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote: > How making it make's option prevent some "smart" distros to achieve the same? > AFAIU any compile-time knob will allow to build a kernel w/o a feature and you > are against of such kernel builds in distros. Catch-22? Because it will fail the build if it finds a trace_printk() in the compiled code, but doesn't touch the config that is shipped, nor does it affect modules being built against this kernel. This patch series is for those that do not want a trace_printk() accidentally left behind in their own work and trigger that big warning and scare their users. But it still gives an option for developers to add a trace_printk. That is, the decision to have trace_printk in a particular output (vmlinux) is done at the compile time, and all it does is to make sure one isn't present at that moment. This series is not about keeping them out completely (test modules, etc), which a config option will. -- Steve
