On Fri, Feb 28, 2025 at 10:15:09AM +0100, Heiko Carstens wrote: > I couldn't find any cover letter for the whole patch series which describes > what this is about, and why it is needed. > It looks like some Rust enablement? Yeah, more or less. It's replacing local_irq_save() and all related functions (spin_lock_irqsave etc..) that take a flags argument with this new thing that frobs a recursion count in preempt_count(), obviating the need to carry the local flags argument around. This is nice, even for C code, less flags muck to carry around. It would be even better if they then went and deleted all of the _irq / _irqsave nonsense entirely. Yes, that's going to be a big patch :-) Also, IIRC there is some arch stuff that comes unstuck if you do this blindly (I tried at some point, it didn't boot).
