Re: [PATCH] dma-buf: move system_cc_shared heap under separate Kconfig

[T.J. Mercier]

On Wed, Jun 10, 2026 at 7:23 AM Sumit Semwal <sumit.semwal@xxxxxxxxxx> wrote:
>
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> While system heap and system_cc_shared heap share a lot of code
> and hence the same source file, their users have different needs.
>
> system heap users need it to be a loadable module, while
> system_cc_shared heap users don't.
>
> Building as a loadable module breaks system_cc_shared heap on
> powerpc and s390 due to un-exported set_memory_encrypted /
> set_memory_decrypted functions.
>
> Fix these by reorganising code to put the system_cc_shared heap
> under a new Kconfig symbol, which allows either building both
> into the kernel, or leave encryption up to the consumers of the
> system heap.
>
> Fixes: fd55edff8a0a ("dma-buf: heaps: system: Turn the heap into a module")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx>

Reviewed-by: T.J. Mercier <tjmercier@xxxxxxxxxx>