[PATCH v4 1/2] selftests: run tests on nommu architecture

[Lorenzo Stoakes (ARM)]

On Fri, Oct 02, 2026 at 01:38:31PM +0200, Geert Uytterhoeven wrote:

> On Fri, 2 Oct 2026 at 10:10, Lorenzo Stoakes (ARM) <ljs at kernel.org> wrote:

> > But fork() -> -EINVAL or -ENOSYS = nommu, then just have the child quit and
> > etc. should do it.
>
> fork() is not strictly an MMU-feature (you can implement fork on nommu
> if all memory accesses are done relative to a base address register),
> while I think mprotect() is an MMU-feature. Unless it can also be used
> to change the protection using the one or two BARs most MCU haves?
> Anything else that is a real MMU-feature? Non-identity mmap()?

Does any nommu arch implement fork() in linux?

--
Cheers, Lorenzo