Re: [PATCH v2] KVM: x86: Add CONFIG_KVM_MAX_NR_VCPUS

[kernel test robot <lkp@intel.com>]

Hi Kyle,

kernel test robot noticed the following build errors:

[auto build test ERROR on kvm/queue]
[also build test ERROR on linus/master v6.5-rc7 next-20230823]
[cannot apply to 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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Kyle-Meyer/KVM-x86-Add-CONFIG_KVM_MAX_NR_VCPUS/20230824-034224
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
patch link:    https://lore.kernel.org/r/20230823193842.2544394-1-kyle.meyer%40hpe.com
patch subject: [PATCH v2] KVM: x86: Add CONFIG_KVM_MAX_NR_VCPUS
config: i386-tinyconfig (https://download.01.org/0day-ci/archive/20230824/202308240540.9fQYjHB2-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230824/202308240540.9fQYjHB2-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308240540.9fQYjHB2-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/vdso/const.h:5,
                    from include/linux/const.h:4,
                    from include/uapi/linux/kernel.h:6,
                    from include/linux/cache.h:5,
                    from include/linux/slab.h:15,
                    from arch/x86/events/intel/core.c:14:
>> arch/x86/include/asm/kvm_host.h:42:23: error: 'CONFIG_KVM_MAX_NR_VCPUS' undeclared here (not in a function)
      42 | #define KVM_MAX_VCPUS CONFIG_KVM_MAX_NR_VCPUS
         |                       ^~~~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/const.h:34:40: note: in definition of macro '__KERNEL_DIV_ROUND_UP'
      34 | #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
         |                                        ^
   arch/x86/include/asm/kvm_host.h:1120:33: note: in expansion of macro 'BITS_TO_LONGS'
    1120 |         unsigned long poll_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
         |                                 ^~~~~~~~~~~~~
   arch/x86/include/asm/kvm_host.h:1120:47: note: in expansion of macro 'KVM_MAX_VCPUS'
    1120 |         unsigned long poll_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
         |                                               ^~~~~~~~~~~~~


vim +/CONFIG_KVM_MAX_NR_VCPUS +42 arch/x86/include/asm/kvm_host.h

    41	
  > 42	#define KVM_MAX_VCPUS CONFIG_KVM_MAX_NR_VCPUS
    43	

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