On Wed, Oct 04, 2017 at 12:36:29PM +0100, Catalin Marinas wrote: > On Wed, Oct 04, 2017 at 12:32:07PM +0100, Dave P Martin wrote: [...] > > I don't think the hwcaps shouldn't change after entry to userspace, > > so it really doesn't matter whether HWCAP_CPUID is set before or > > after registration: for userspace it should all already have happened. > > Good point, I forgot about this. > > > It looks to me like all initcalls are called in the same kernel thread > > that execs the initramfs init process, before the exec. > > > > So I still don't see how a built-in late initcall can not have been > > called before entry to userspace. > > > > The patch seems to demonstrate that I'm wrong though. > > What am I missing? > > I also wondered about this. I think is the kernel invoking modprobe > before the actual init/linuxrc in an initrd. Ah, right. Could that be a bug, do you think? I wonder whether it's even well-defined how early that can happen. i.e., which initcall level is guaranteed early enough to prevent this? Cheers ---Dave