[PATCH] arm64:acpi fix the acpi alignment exception when 'mem=' specified

[kbuild test robot]

Hi,

[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on v4.7-rc5 next-20160627]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Dennis-Chen/arm64-acpi-fix-the-acpi-alignment-exception-when-mem-specified/20160622-183826
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: arm64-allmodconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 5.3.1-8) 5.3.1 20160205
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All errors (new ones prefixed by >>):

   arch/arm64/kernel/built-in.o: In function `acpi_boot_table_init':
>> arch/arm64/kernel/vdso/vdso.o:(.init.text+0x3204): undefined reference to `nr_acpi_regs'
   aarch64-linux-gnu-ld: arch/arm64/kernel/built-in.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against external symbol `nr_acpi_regs' can not be used when making a shared object; recompile with -fPIC
>> arch/arm64/kernel/vdso/vdso.o:(.init.text+0x3208): undefined reference to `acpi_regs'
   aarch64-linux-gnu-ld: arch/arm64/kernel/built-in.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against external symbol `acpi_regs' can not be used when making a shared object; recompile with -fPIC
   arch/arm64/kernel/vdso/vdso.o:(.init.text+0x3210): undefined reference to `nr_acpi_regs'
   arch/arm64/kernel/vdso/vdso.o:(.init.text+0x3218): undefined reference to `acpi_regs'
   lib/built-in.o: In function `get_signed_val':
   ubsan.c:(.text.unlikely+0xa20): undefined reference to `__ashlti3'
   ubsan.c:(.text.unlikely+0xa28): undefined reference to `__ashrti3'

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