[PATCH] powerpc/kdump: Add support for crashkernel CMA reservation

[kernel test robot]

Hi Sourabh,

kernel test robot noticed the following build errors:

[auto build test ERROR on powerpc/next]
[also build test ERROR on powerpc/fixes linus/master v6.18-rc2 next-20251022]
[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/powerpc-kdump-Add-support-for-crashkernel-CMA-reservation/20251022-182711
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
patch link:    https://lore.kernel.org/r/20251022102531.657147-1-sourabhjain%40linux.ibm.com
patch subject: [PATCH] powerpc/kdump: Add support for crashkernel CMA reservation
config: powerpc-allnoconfig (https://download.01.org/0day-ci/archive/20251023/202510230817.h1gNa0VV-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251023/202510230817.h1gNa0VV-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/202510230817.h1gNa0VV-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/setup-common.c: In function 'setup_arch':
>> arch/powerpc/kernel/setup-common.c:1004:9: error: implicit declaration of function 'kdump_cma_reserve'; did you mean 'kvm_cma_reserve'? [-Wimplicit-function-declaration]
    1004 |         kdump_cma_reserve();
         |         ^~~~~~~~~~~~~~~~~
         |         kvm_cma_reserve


vim +1004 arch/powerpc/kernel/setup-common.c

   976	
   977		/* Print various info about the machine that has been gathered so far. */
   978		print_system_info();
   979	
   980		klp_init_thread_info(&init_task);
   981	
   982		setup_initial_init_mm(_stext, _etext, _edata, _end);
   983		/* sched_init() does the mmgrab(&init_mm) for the primary CPU */
   984		VM_WARN_ON(cpumask_test_cpu(smp_processor_id(), mm_cpumask(&init_mm)));
   985		cpumask_set_cpu(smp_processor_id(), mm_cpumask(&init_mm));
   986		inc_mm_active_cpus(&init_mm);
   987		mm_iommu_init(&init_mm);
   988	
   989		irqstack_early_init();
   990		exc_lvl_early_init();
   991		emergency_stack_init();
   992	
   993		mce_init();
   994		smp_release_cpus();
   995	
   996		initmem_init();
   997	
   998		/*
   999		 * Reserve large chunks of memory for use by CMA for kdump, fadump, KVM and
  1000		 * hugetlb. These must be called after initmem_init(), so that
  1001		 * pageblock_order is initialised.
  1002		 */
  1003		fadump_cma_init();
> 1004		kdump_cma_reserve();

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki