linux-kernel - Re: [PATCH] powerpc/kdump: pass dm-crypt keys to kdump kernel

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Message-ID: <aVy9qfeSDZyKybIC@Rk>
Date: Tue, 6 Jan 2026 15:46:57 +0800
From: Coiby Xu <coxu@...hat.com>
To: kernel test robot <lkp@...el.com>
Cc: kexec@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org, 
	llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, 
	Thomas Staudt <tstaudt@...ibm.com>, Arnaud Lefebvre <arnaud.lefebvre@...ver-cloud.com>, 
	Baoquan he <bhe@...hat.com>, Dave Young <dyoung@...hat.com>, Kairui Song <ryncsn@...il.com>, 
	Pingfan Liu <kernelfans@...il.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	Linux Memory Management List <linux-mm@...ck.org>, Madhavan Srinivasan <maddy@...ux.ibm.com>, 
	Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, 
	"Christophe Leroy (CS GROUP)" <chleroy@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/kdump: pass dm-crypt keys to kdump kernel

On Sat, Dec 27, 2025 at 10:35:11PM +0800, kernel test robot wrote:
>Hi Coiby,
>
>kernel test robot noticed the following build errors:
>
>[auto build test ERROR on ccd1cdca5cd433c8a5dff78b69a79b31d9b77ee1]
>
>url:    https://github.com/intel-lab-lkp/linux/commits/Coiby-Xu/powerpc-kdump-pass-dm-crypt-keys-to-kdump-kernel/20251226-220726
>base:   ccd1cdca5cd433c8a5dff78b69a79b31d9b77ee1
>patch link:    https://lore.kernel.org/r/20251226140636.1378505-1-coxu%40redhat.com
>patch subject: [PATCH] powerpc/kdump: pass dm-crypt keys to kdump kernel
>config: powerpc64-randconfig-001-20251227 (https://download.01.org/0day-ci/archive/20251227/202512272218.ghBaSjzO-lkp@intel.com/config)
>compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4ef602d446057dabf5f61fb221669ecbeda49279)
>reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251227/202512272218.ghBaSjzO-lkp@intel.com/reproduce)
>
>If you fix the issue in a separate patch/commit (i.e. not just a new version of
>the same patch/commit), kindly add following tags
>| Reported-by: kernel test robot <lkp@...el.com>
>| Closes: https://lore.kernel.org/oe-kbuild-all/202512272218.ghBaSjzO-lkp@intel.com/
>
>All errors (new ones prefixed by >>):
>
>>> arch/powerpc/kexec/elf_64.c:95:9: error: call to undeclared function 'crash_load_dm_crypt_keys'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>      95 |                 ret = crash_load_dm_crypt_keys(image);
>         |                       ^
>   1 error generated.

This issue has been addressed in v2
https://lore.kernel.org/all/20260106074039.564707-1-coxu@redhat.com/

Thanks!

-- 
Best regards,
Coiby