Hi Keqian,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on tip/timers/core]
[also build test ERROR on arm64/for-next/core v5.9-rc1 next-20200817]
[cannot apply to kvmarm/next kvm/linux-next]
[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/Keqian-Zhu/KVM-arm64-Add-pvtime-LPT-support/20200817-164436
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 0099808553ad4f9c04ad7afd966f6d7f470f247f
config: arm64-randconfig-r005-20200817 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        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
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

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

All errors (new ones prefixed by >>):

   In file included from include/linux/byteorder/little_endian.h:5,
                    from arch/arm64/include/uapi/asm/byteorder.h:23,
                    from include/asm-generic/bitops/le.h:6,
                    from arch/arm64/include/asm/bitops.h:29,
                    from include/linux/bitops.h:29,
                    from include/linux/of.h:15,
                    from include/linux/irqdomain.h:35,
                    from include/linux/acpi.h:13,
                    from include/acpi/apei.h:9,
                    from include/acpi/ghes.h:5,
                    from include/linux/arm_sdei.h:8,
                    from arch/arm64/kernel/asm-offsets.c:10:
   arch/arm64/include/asm/arch_timer.h: In function 'native_to_pv_cycles':
>> arch/arm64/include/asm/arch_timer.h:135:39: error: dereferencing pointer to incomplete type 'struct pvclock_vm_lpt_time'
     135 |  u64 scale_mult = le64_to_cpu(lpt_info->scale_mult);
         |                                       ^~
   include/uapi/linux/byteorder/little_endian.h:32:51: note: in definition of macro '__le64_to_cpu'
      32 | #define __le64_to_cpu(x) ((__force __u64)(__le64)(x))
         |                                                   ^
   arch/arm64/include/asm/arch_timer.h:135:19: note: in expansion of macro 'le64_to_cpu'
     135 |  u64 scale_mult = le64_to_cpu(lpt_info->scale_mult);
         |                   ^~~~~~~~~~~
   make[2]: *** [scripts/Makefile.build:114: arch/arm64/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1185: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:185: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

# https://github.com/0day-ci/linux/commit/47f3527190b7f8b53c7c48c278fc7aecef3ef812
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Keqian-Zhu/KVM-arm64-Add-pvtime-LPT-support/20200817-164436
git checkout 47f3527190b7f8b53c7c48c278fc7aecef3ef812
vim +135 arch/arm64/include/asm/arch_timer.h

   132	
   133	static inline u64 native_to_pv_cycles(u64 cnt)
   134	{
 > 135		u64 scale_mult = le64_to_cpu(lpt_info->scale_mult);
   136		u32 fracbits = le32_to_cpu(lpt_info->fracbits);
   137	
   138		return mul_u64_u64_shr(scale_mult, cnt, fracbits);
   139	}
   140	

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