Re: [PATCH v2 2/5] KVM: arm64: Enable ring-based dirty memory tracking

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Hi Gavin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on kvm/queue]
[also build test WARNING on kvmarm/next linus/master v6.0-rc5 next-20220916]
[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/Gavin-Shan/KVM-arm64-Enable-ring-based-dirty-memory-tracking/20220916-125417
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20220918/202209180726.FLL69aKA-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/a1a4cd8f6a5e8927f800baff7d965870a1b7d7ba
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Gavin-Shan/KVM-arm64-Enable-ring-based-dirty-memory-tracking/20220916-125417
        git checkout a1a4cd8f6a5e8927f800baff7d965870a1b7d7ba
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> arch/arm64/kvm/../../../virt/kvm/dirty_ring.c:14:12: warning: no previous prototype for 'kvm_cpu_dirty_log_size' [-Wmissing-prototypes]
      14 | int __weak kvm_cpu_dirty_log_size(void)
         |            ^~~~~~~~~~~~~~~~~~~~~~


vim +/kvm_cpu_dirty_log_size +14 arch/arm64/kvm/../../../virt/kvm/dirty_ring.c

fb04a1eddb1a65 Peter Xu 2020-09-30  13  
fb04a1eddb1a65 Peter Xu 2020-09-30 @14  int __weak kvm_cpu_dirty_log_size(void)
fb04a1eddb1a65 Peter Xu 2020-09-30  15  {
fb04a1eddb1a65 Peter Xu 2020-09-30  16  	return 0;
fb04a1eddb1a65 Peter Xu 2020-09-30  17  }
fb04a1eddb1a65 Peter Xu 2020-09-30  18  

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



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