Hi Hari,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on powerpc/next]
[also build test WARNING on hnaz-linux-mm/master linus/master v5.8-rc7 next-20200729]
[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]

url:    https://github.com/0day-ci/linux/commits/Hari-Bathini/kexec_file-allow-archs-to-handle-special-regions-while-locating-memory-hole/20200727-043703
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-randconfig-s031-20200729 (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
        # apt-get install sparse
        # sparse version: v0.6.2-97-gee4aea9a-dirty
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc 

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


sparse warnings: (new ones prefixed by >>)

>> arch/powerpc/kexec/file_load_64.c:391:45: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long [usertype] @@     got restricted __be64 [usertype] @@
>> arch/powerpc/kexec/file_load_64.c:391:45: sparse:     expected unsigned long long [usertype]
>> arch/powerpc/kexec/file_load_64.c:391:45: sparse:     got restricted __be64 [usertype]
   arch/powerpc/kexec/file_load_64.c:392:45: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long [usertype] @@     got restricted __be64 [usertype] @@
   arch/powerpc/kexec/file_load_64.c:392:45: sparse:     expected unsigned long long [usertype]
   arch/powerpc/kexec/file_load_64.c:392:45: sparse:     got restricted __be64 [usertype]
   arch/powerpc/kexec/file_load_64.c:439:39: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long [usertype] @@     got restricted __be64 [usertype] @@
   arch/powerpc/kexec/file_load_64.c:439:39: sparse:     expected unsigned long long [usertype]
   arch/powerpc/kexec/file_load_64.c:439:39: sparse:     got restricted __be64 [usertype]

vim +391 arch/powerpc/kexec/file_load_64.c

   351	
   352	/**
   353	 * add_usable_mem - Add the usable memory ranges within the given memory range
   354	 *                  to the buffer
   355	 * @um_info:        Usable memory buffer and ranges info.
   356	 * @base:           Base address of memory range to look for.
   357	 * @end:            End address of memory range to look for.
   358	 * @cnt:            No. of usable memory ranges added to buffer.
   359	 *
   360	 * Returns 0 on success, negative errno on error.
   361	 */
   362	static int add_usable_mem(struct umem_info *um_info, uint64_t base,
   363				  uint64_t end, int *cnt)
   364	{
   365		uint64_t loc_base, loc_end, *buf;
   366		const struct crash_mem *umrngs;
   367		int i, add;
   368	
   369		*cnt = 0;
   370		umrngs = um_info->umrngs;
   371		for (i = 0; i < umrngs->nr_ranges; i++) {
   372			add = 0;
   373			loc_base = umrngs->ranges[i].start;
   374			loc_end = umrngs->ranges[i].end;
   375			if (loc_base >= base && loc_end <= end)
   376				add = 1;
   377			else if (base < loc_end && end > loc_base) {
   378				if (loc_base < base)
   379					loc_base = base;
   380				if (loc_end > end)
   381					loc_end = end;
   382				add = 1;
   383			}
   384	
   385			if (add) {
   386				buf = check_realloc_usable_mem(um_info, 2);
   387				if (!buf)
   388					return -ENOMEM;
   389	
   390				um_info->buf = buf;
 > 391				buf[um_info->idx++] = cpu_to_be64(loc_base);
   392				buf[um_info->idx++] =
   393						cpu_to_be64(loc_end - loc_base + 1);
   394				(*cnt)++;
   395			}
   396		}
   397	
   398		return 0;
   399	}
   400	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org