Re: [PATCH] microblaze: remove CONFIG_SET_FS

[Linus Torvalds]

On Fri, Feb 11, 2022 at 9:00 AM Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
>
> I have now uploaded a cleanup series to
> https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=set_fs
>
> This uses the same access_ok() function across almost all
> architectures, with the exception of those that need something else,
> and I then I went further and killed off set_fs for everything other
> than ia64.

Thanks, looks good to me.

Can you say why you didn't convert ia64? I don't see any set_fs() use
there, except for the unaligned handler, which looks trivial to
remove. It looks like the only reason for it is kernel-mode unaligned
exceptions, which we should just turn fatal, I suspect (they already
get logged).

And ia64 people could make the unaligned handling do the kernel mode
case in emulate_load/store_int() - it doesn't look *that* painful.

But maybe you noticed something else?

It would be really good to just be able to say that set_fs() no longer
exists at all.

                Linus