Re: [PATCH v4 01/13] kexec: consolidate kexec and crash options into kernel/Kconfig.kexec

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On Wed, Jul 5, 2023, at 16:19, Eric DeVolder wrote:
> +
> +config CRASH_DUMP
> +	bool "kernel crash dumps"
> +	depends on ARCH_SUPPORTS_CRASH_DUMP
> +	select CRASH_CORE
> +	select KEXEC

Today's linux-next now runs into a warning on arm64 and
presumably others, with the same problem as on arm earlier:

WARNING: unmet direct dependencies detected for KEXEC
  Depends on [n]: ARCH_SUPPORTS_KEXEC [=n]
  Selected by [y]:
  - CRASH_DUMP [=y] && ARCH_SUPPORTS_CRASH_DUMP [=y]

I think the easiest way to make this reliable would be
this fixup:

diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec
index d82a7ce59c051..e58ca6128d6ee 100644
--- a/kernel/Kconfig.kexec
+++ b/kernel/Kconfig.kexec
@@ -91,6 +91,7 @@ config KEXEC_JUMP
 config CRASH_DUMP
        bool "kernel crash dumps"
        depends on ARCH_SUPPORTS_CRASH_DUMP
+       depends on ARCH_SUPPORTS_KEXEC
        select CRASH_CORE
        select KEXEC
        help

   Arnd



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