Re: arch/sh/kernel/relocate_kernel.S:38: Error: invalid operands for opcode

[Al Viro]

On Wed, Dec 20, 2023 at 09:27:32PM +0800, Baoquan He wrote:
> Since the kexec_core code building depends on CONFIG_MMU=y, we may
> need to add dependency on MMU for ARCH_SUPPORTS_CRASH_DUMP. I made below
> change, do you think it's OK?
> 
> diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
> index 7500521b2b98..fe1500871648 100644
> --- a/arch/sh/Kconfig
> +++ b/arch/sh/Kconfig
> @@ -548,6 +548,7 @@ config ARCH_SUPPORTS_KEXEC
>  
>  config ARCH_SUPPORTS_CRASH_DUMP
>         def_bool BROKEN_ON_SMP
> +       depends on MMU
>  
>  config ARCH_SUPPORTS_KEXEC_JUMP
>         def_bool y
> 

I'm *not* familiar with crashdump or kexec machinery, let alone the
current changes in there, so take the following with a cartload of
salt, but...  does sh crash dump support depend upon the code in
question?  From quick grep it looks like we only want it in machine_kexec(),
so the conditionals used in the commit in question might be wrong...