tree:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
head:   30df74d67d48949da87e3a5b57c381763e8fd526
commit: 140777a3d8dfdb3d3f20ea7707c0f1c0ce1b0aa5 [17/110] powerpc/fadump: consider reserved ranges while reserving memory
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 140777a3d8dfdb3d3f20ea7707c0f1c0ce1b0aa5
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

arch/powerpc/kernel/fadump.c:71:12: warning: no previous prototype for 'fadump_cma_init' [-Wmissing-prototypes]
71 | int __init fadump_cma_init(void)
|            ^~~~~~~~~~~~~~~
arch/powerpc/kernel/fadump.c: In function 'fadump_reserve_mem':
>> arch/powerpc/kernel/fadump.c:513:18: warning: variable 'mem_boundary' set but not used [-Wunused-but-set-variable]
513 |  u64 base, size, mem_boundary, bootmem_min;
|                  ^~~~~~~~~~~~
arch/powerpc/kernel/fadump.c: In function 'fadump_update_elfcore_header':
arch/powerpc/kernel/fadump.c:731:17: warning: variable 'elf' set but not used [-Wunused-but-set-variable]
731 |  struct elfhdr *elf;
|                 ^~~

vim +/mem_boundary +513 arch/powerpc/kernel/fadump.c

   510	
   511	int __init fadump_reserve_mem(void)
   512	{
 > 513		u64 base, size, mem_boundary, bootmem_min;
   514		int ret = 1;
   515	
   516		if (!fw_dump.fadump_enabled)
   517			return 0;
   518	
   519		if (!fw_dump.fadump_supported) {
   520			pr_info("Firmware-Assisted Dump is not supported on this hardware\n");
   521			goto error_out;
   522		}
   523	
   524		/*
   525		 * Initialize boot memory size
   526		 * If dump is active then we have already calculated the size during
   527		 * first kernel.
   528		 */
   529		if (!fw_dump.dump_active) {
   530			fw_dump.boot_memory_size =
   531				PAGE_ALIGN(fadump_calculate_reserve_size());
   532	#ifdef CONFIG_CMA
   533			if (!fw_dump.nocma) {
   534				fw_dump.boot_memory_size =
   535					ALIGN(fw_dump.boot_memory_size,
   536					      FADUMP_CMA_ALIGNMENT);
   537			}
   538	#endif
   539	
   540			bootmem_min = fw_dump.ops->fadump_get_bootmem_min();
   541			if (fw_dump.boot_memory_size < bootmem_min) {
   542				pr_err("Can't enable fadump with boot memory size (0x%lx) less than 0x%llx\n",
   543				       fw_dump.boot_memory_size, bootmem_min);
   544				goto error_out;
   545			}
   546	
   547			if (!fadump_get_boot_mem_regions()) {
   548				pr_err("Too many holes in boot memory area to enable fadump\n");
   549				goto error_out;
   550			}
   551		}
   552	
   553		/*
   554		 * Calculate the memory boundary.
   555		 * If memory_limit is less than actual memory boundary then reserve
   556		 * the memory for fadump beyond the memory_limit and adjust the
   557		 * memory_limit accordingly, so that the running kernel can run with
   558		 * specified memory_limit.
   559		 */
   560		if (memory_limit && memory_limit < memblock_end_of_DRAM()) {
   561			size = get_fadump_area_size();
   562			if ((memory_limit + size) < memblock_end_of_DRAM())
   563				memory_limit += size;
   564			else
   565				memory_limit = memblock_end_of_DRAM();
   566			printk(KERN_INFO "Adjusted memory_limit for firmware-assisted"
   567					" dump, now %#016llx\n", memory_limit);
   568		}
   569		if (memory_limit)
   570			mem_boundary = memory_limit;
   571		else
   572			mem_boundary = memblock_end_of_DRAM();
   573	
   574		base = fw_dump.boot_mem_top;
   575		size = get_fadump_area_size();
   576		fw_dump.reserve_dump_area_size = size;
   577		if (fw_dump.dump_active) {
   578			pr_info("Firmware-assisted dump is active.\n");
   579	

---
0-DAY CI Kernel Test Service, Intel Corporation
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