On Fri, Nov 12, 2021 at 06:32:33PM +0000, Cristian Marussi wrote: > Looking at the implementation of atomic_notifier_chain_register() and > its internal helper down below, I can see that atomic_notifier_chain_register() > ALWAYS return 0 (O_o) and anyway there is a WARN() in the notifiier core already > to alert of double registrations. You can ignore it - we agreed (at least no one has complained against it yet :)) on doing this instead: https://lore.kernel.org/r/YYk1xi3eJdMJdjHC@xxxxxxx -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette