Re: [PATCH] atomic: Specify natural alignment for atomic_t

[Peter Zijlstra]

On Mon, Aug 25, 2025 at 06:03:23PM +1000, Finn Thain wrote:
> 
> On Mon, 25 Aug 2025, Peter Zijlstra wrote:
> 
> > 
> > And your architecture doesn't trap on unaligned atomic access ?!!?!
> > 
> 
> Right. This port doesn't do SMP.

There is RMW_INSN which seems to imply a compare-and-swap instruction of
sorts. That is happy to work on unaligned storage?

Anyway, it might make sense to add an alignment check to
arch/m68k/include/asm/atomic.h somewhere, perhaps dependent on
some DEBUG flag or other.