linux-kernel - Re: [PATCH v1 10/21] powerpc/kexec: refactor for kernel/Kconfig.kexec

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Date:   Thu, 15 Jun 2023 11:19:52 -0500
From:   Segher Boessenkool <segher@...nel.crashing.org>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Eric DeVolder <eric.devolder@...cle.com>, linux@...linux.org.uk,
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Subject: Re: [PATCH v1 10/21] powerpc/kexec: refactor for kernel/Kconfig.kexec

On Thu, Jun 15, 2023 at 01:34:25PM +1000, Michael Ellerman wrote:
> Eric DeVolder <eric.devolder@...cle.com> writes:
> > -config KEXEC_FILE
> > -	bool "kexec file based system call"
> > -	select KEXEC_CORE
> > -	select HAVE_IMA_KEXEC if IMA
> > -	select KEXEC_ELF
> > -	depends on PPC64
> > -	depends on CRYPTO=y
> > -	depends on CRYPTO_SHA256=y
> ...
> > +
> > +config ARCH_HAS_KEXEC_FILE
> > +	def_bool PPC64 && CRYPTO && CRYPTO_SHA256
> 
> The =y's got lost here.
> 
> I think they were both meaningful, because both options are tristate. So
> this previously required them to be built-in (=y), whereas after your
> patch it will allow them to be modules.
> 
> I don't know for sure that those options need to be built-in, but that's
> what the code does now, so this patch shouldn't change it, at least
> without an explanation.

This patch shouldn't change it at all, period.  If you want to change it
(and that sounds like a good idea, if it is possible anyway), that
should be a separate patch.


Segher