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

From: Coiby Xu <[email-masked]>
Date: Tue, 6 Jan 2026 15:46:57 +0800

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/[email-masked]/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/[email-masked]/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 <[email-masked]>
>| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/
>
>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/[email-masked]/

Thanks!

-- 
Best regards,
Coiby