[PATCHv4 08/12] kexec: Factor out routine to find a symbol in ELF

[kernel test robot]

Hi Pingfan,

kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/net]
[also build test ERROR on bpf/master arm64/for-next/core linus/master v6.16-rc7]
[cannot apply to bpf-next/master next-20250722]
[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/Pingfan-Liu/kexec_file-Make-kexec_image_load_default-global-visible/20250722-100843
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git net
patch link:    https://lore.kernel.org/r/20250722020319.5837-9-piliu%40redhat.com
patch subject: [PATCHv4 08/12] kexec: Factor out routine to find a symbol in ELF
config: x86_64-buildonly-randconfig-006-20250722 (https://download.01.org/0day-ci/archive/20250723/202507230016.NQ1WXqwG-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250723/202507230016.NQ1WXqwG-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/202507230016.NQ1WXqwG-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/crash_dump.h:5,
                    from drivers/of/fdt.c:11:
>> include/linux/kexec.h:544:7: error: unknown type name 'Elf_Sym'
     544 | const Elf_Sym *elf_find_symbol(const Elf_Ehdr *ehdr, const char *name);
         |       ^~~~~~~
>> include/linux/kexec.h:544:38: error: unknown type name 'Elf_Ehdr'
     544 | const Elf_Sym *elf_find_symbol(const Elf_Ehdr *ehdr, const char *name);
         |                                      ^~~~~~~~


vim +/Elf_Sym +544 include/linux/kexec.h

   542	
   543	#if defined(CONFIG_ARCH_SUPPORTS_KEXEC_PURGATORY) || defined(CONFIG_KEXEC_PE_IMAGE)
 > 544	const Elf_Sym *elf_find_symbol(const Elf_Ehdr *ehdr, const char *name);
   545	#endif
   546	

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