Re: [PATCH v12 6/6] powerpc: add crash memory hotplug support

[Sourabh Jain <sourabhjain@linux.ibm.com>]

Hello,

On 30/10/23 06:13, kernel test robot wrote:
> Hi Sourabh,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on akpm-mm/mm-everything]
> [also build test ERROR on linus/master v6.6-rc7]
> [cannot apply to powerpc/next powerpc/fixes tip/x86/core next-20231027]
> [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/Sourabh-Jain/crash-forward-memory_notify-arg-to-arch-crash-hotplug-handler/20231029-213858
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/20231029124039.6158-7-sourabhjain%40linux.ibm.com
> patch subject: [PATCH v12 6/6] powerpc: add crash memory hotplug support
> config: powerpc64-randconfig-001-20231029 (https://download.01.org/0day-ci/archive/20231030/202310300812.yN6FuPcZ-lkp@intel.com/config)
> compiler: powerpc64-linux-gcc (GCC) 13.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231030/202310300812.yN6FuPcZ-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@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202310300812.yN6FuPcZ-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
>     powerpc64-linux-ld: warning: discarding dynamic section .glink
>     powerpc64-linux-ld: warning: discarding dynamic section .plt
>     powerpc64-linux-ld: linkage table error against `add_opal_mem_range'
>     powerpc64-linux-ld: stubs don't match calculated size
>     powerpc64-linux-ld: can not build stubs: bad value
>     powerpc64-linux-ld: arch/powerpc/kexec/core_64.o: in function `get_crash_memory_ranges':
>     core_64.c:(.text+0x1010): undefined reference to `add_mem_range'
>     powerpc64-linux-ld: core_64.c:(.text+0x1064): undefined reference to `sort_memory_ranges'
>     powerpc64-linux-ld: core_64.c:(.text+0x1128): undefined reference to `add_rtas_mem_range'
>     powerpc64-linux-ld: core_64.c:(.text+0x1140): undefined reference to `add_opal_mem_range'
>     powerpc64-linux-ld: core_64.c:(.text+0x1160): undefined reference to `add_mem_range'
>     powerpc64-linux-ld: core_64.c:(.text+0x1188): undefined reference to `sort_memory_ranges'
>     powerpc64-linux-ld: core_64.c:(.text+0x11e0): undefined reference to `realloc_mem_ranges'
>     powerpc64-linux-ld: arch/powerpc/kexec/core_64.o: in function `arch_crash_handle_hotplug_event':
>>> core_64.c:(.text+0x1900): undefined reference to `remove_mem_range'

The patch series uses a couple of functions defined in 
arch/powerpc/kexec/ranges.c. Since this file
only builds when CONFIG_KEXEC_FILE is set, we are encountering this 
build issue.

If CONFIG_KEXEC_FILE is set, then this issue is not observed.

I will fix the above warnings and post the next version.

Thanks,
Sourabh