Subject: Re: [PATCH v2 4/5] modules: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC

From: Daniel Thompson <[email-masked]>
Date: Fri, 28 Jan 2022 14:09:47 +0000

On Thu, Jan 27, 2022 at 11:28:09AM +0000, Christophe Leroy wrote:
> Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC to allow architectures
> to request having modules data in vmalloc area instead of module area.
> 
> This is required on powerpc book3s/32 in order to set data non
> executable, because it is not possible to set executability on page
> basis, this is done per 256 Mbytes segments. The module area has exec
> right, vmalloc area has noexec.
> 
> This can also be useful on other powerpc/32 in order to maximize the
> chance of code being close enough to kernel core to avoid branch
> trampolines.
> 
> Signed-off-by: Christophe Leroy <[email-masked]>
> Cc: Jason Wessel <[email-masked]>
> Cc: Daniel Thompson <[email-masked]>
> Cc: Douglas Anderson <[email-masked]>

Thanks for diligence in making sure kdb is up to date!

Acked-by: Daniel Thompson <[email-masked]>

Daniel.