Hi Ard, On Sat, Sep 29, 2018 at 8:16 AM Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote: > > You mean to say that since these nobs are def_bool y and are > > essentially "depends on ARM", then I should just straight up use > > CONFIG_ARM? I had thought about this, but figured this would make it > > easier to later make these optional or have other options block them > > need be, or even if the dependencies and requirements for having them > > changes (for example, with UML on x86). I think doing it this way > > gives us some flexibility later on. So if that's a compelling enough > > reason, I'd like to keep those. > > Sure. But probably better to be consistent then, and stop using > CONFIG_ARM directly in your code. Ack. > > The reason it was added was indeed because of: > > https://lists.01.org/pipermail/kbuild-all/2018-September/053114.html > > -- exactly what you suspected, ARCH_RPC. Have a better suggestion than > > !CPU_32v3? > > Yes, you could just add > > asflags-$(CONFIG_CPU_32v3) += -march=armv4 > > with a comment stating that we don't actually support ARMv3 but only > use it as a code generation target for reasons unrelated to the ISA Alright, I'll do exactly that. Though, if the rationale for this has to do only with codegen -- with what the C compiler does -- then shouldn't this be set globally for CONFIG_CPU_32v3? I couldn't find any macros that test against __LINUX_ARM_ARCH__ being 3 in the assembly, so this shouldn't be a problem I don't think. Maybe I'll send a patch. Jason
