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SubjectRe: [PATCH V11 1/5] mm/hotplug: Introduce arch callback validating the hot remove range
Hi Anshuman,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.5-rc5 next-20200110]
[cannot apply to arm64/for-next/core robh/for-next linux/master]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Anshuman-Khandual/arm64-mm-Enable-memory-hot-remove/20200111-003854
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4a3033ef6e6bb4c566bd1d556de69b494d76976c
config: arm64-randconfig-a001-20200109 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 7.5.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.5.0 make.cross ARCH=arm64

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

All errors (new ones prefixed by >>):

mm/memory_hotplug.c: In function 'check_hotremove_memory_range':
>> mm/memory_hotplug.c:1027:7: error: implicit declaration of function 'arch_memory_removable'; did you mean 'add_memory_resource'? [-Werror=implicit-function-declaration]
rc = arch_memory_removable(start, size);
^~~~~~~~~~~~~~~~~~~~~
add_memory_resource
At top level:
mm/memory_hotplug.c:1017:12: warning: 'check_hotremove_memory_range' defined but not used [-Wunused-function]
static int check_hotremove_memory_range(u64 start, u64 size)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +1027 mm/memory_hotplug.c

1016
1017 static int check_hotremove_memory_range(u64 start, u64 size)
1018 {
1019 int rc;
1020
1021 BUG_ON(check_hotplug_memory_range(start, size));
1022
1023 /*
1024 * First check if the platform is willing to have this
1025 * memory range removed else just abort.
1026 */
> 1027 rc = arch_memory_removable(start, size);
1028 if (!rc)
1029 return -EINVAL;
1030
1031 return 0;
1032 }
1033

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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