In user space, I use assertions to check (and document) the assumptions built in to my code - this value won't ever be negative, this int will only ever by one of these 3 values, etc. For kernel code, I can use pr_err, dump_stack, WARN_ON, etc. to report the issue in the log, but I often also need to return some sort of error code (negative errno value). Is there any sort of convention around what to return in the case of an error in the logic of the code itself, something that will make it as obvious as possible that the problem is a bug. TIA! -- ======================================================================== In Soviet Russia, Google searches you! ========================================================================