Hi Jisheng,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.0]
[cannot apply to next-20221007]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jisheng-Zhang/riscv-improve-boot-time-isa-extensions-handling/20221006-152055
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 833477fce7a14d43ae4c07f8ddc32fa5119471a2
config: riscv-randconfig-r003-20221003
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/322e8b44d0cc6b6b2bd179469be16d70df012a1e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jisheng-Zhang/riscv-improve-boot-time-isa-extensions-handling/20221006-152055
        git checkout 322e8b44d0cc6b6b2bd179469be16d70df012a1e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv prepare

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

All errors (new ones prefixed by >>):

>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp0'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x0)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp2'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x8)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp20'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0xB4)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp22'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0xBC)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp4'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x24)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp6'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x2C)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp8'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x48)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp10'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x50)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp12'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x6C)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp14'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x74)
--
>> ld.lld: error: relocation R_RISCV_64 cannot be used against symbol '.Ltmp16'; recompile with -fPIC
   >>> defined in arch/riscv/kernel/vdso/vgettimeofday.o
   >>> referenced by vgettimeofday.c
   >>>               arch/riscv/kernel/vdso/vgettimeofday.o:(.alternative+0x90)
..

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp