[PATCH v3 1/2] ARM: ioremap: Sync PGDs for VMALLOC shadow

[Linus Walleij]

On Mon, Oct 21, 2024 at 2:12 PM Clement LE GOFFIC
<clement.legoffic at foss.st.com> wrote:

> I saw your email about Melon's patch targeting the same subject.
> If we don't enable KASAN either you patch or Melon's one do not compile.
>
> [...]
> +       if (IS_ENABLED(CONFIG_KASAN_VMALLOC))
> [...]
>
> Should be replaced with an #ifdef directive.
> `kasan_mem_to_shadow` symbol is hiden behind :
>
> include/linux/kasan.h:32:#if defined(CONFIG_KASAN_GENERIC) ||
> defined(CONFIG_KASAN_SW_TAGS)
>
> So symbol doesn't exist without KASAN enabled.

Yeah sorry for missing this. :(

The absence of stubs in the Kasan header makes it necessary to rely
on ifdefs.

I will fold the ideas from Melon's patch into mine and also develop
a version that works with ifdefs.

Yours,
Linus Walleij