[PATCH v3 2/7] crash_dump: make dm crypt keys persist for the kdump kernel

[kernel test robot]

Hi Coiby,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.9-rc5 next-20240426]
[cannot apply to tip/x86/core]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Coiby-Xu/kexec_file-allow-to-place-kexec_buf-randomly/20240425-180836
base:   linus/master
patch link:    https://lore.kernel.org/r/20240425100434.198925-3-coxu%40redhat.com
patch subject: [PATCH v3 2/7] crash_dump: make dm crypt keys persist for the kdump kernel
config: x86_64-randconfig-r113-20240426 (https://download.01.org/0day-ci/archive/20240426/202404262003.qsWvGwZU-lkp@intel.com/config)
compiler: gcc-10 (Ubuntu 10.5.0-1ubuntu1) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240426/202404262003.qsWvGwZU-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404262003.qsWvGwZU-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/crash_dump_dm_crypt.c:31:3: sparse: sparse: symbol 'keys_header' was not declared. Should it be static?

vim +/keys_header +31 kernel/crash_dump_dm_crypt.c

    27	
    28	struct keys_header {
    29		unsigned int key_count;
    30		struct dm_crypt_key keys[] __counted_by(key_count);
  > 31	} *keys_header;
    32	

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