Re: [PATCH] kvm: avoid unused variable warning for UP builds

From: kbuild test robot
Date: Thu Jul 06 2017 - 04:14:15 EST


Hi Paolo,

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on v4.12]
[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/Paolo-Bonzini/kvm-avoid-unused-variable-warning-for-UP-builds/20170706-051225
base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: x86_64-allyesdebian (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

arch/x86/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_make_all_cpus_request':
>> arch/x86/kvm/../../../virt/kvm/kvm_main.c:221:4: error: implicit declaration of function '__cpumask_set_cpu' [-Werror=implicit-function-declaration]
__cpumask_set_cpu(cpu, cpus);
^~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +/__cpumask_set_cpu +221 arch/x86/kvm/../../../virt/kvm/kvm_main.c

215
216 if (!(req & KVM_REQUEST_NO_WAKEUP) && kvm_vcpu_wake_up(vcpu))
217 continue;
218
219 if (cpus != NULL && cpu != -1 && cpu != me &&
220 kvm_request_needs_ipi(vcpu, req))
> 221 __cpumask_set_cpu(cpu, cpus);
222 }
223 called = kvm_kick_many_cpus(cpus, !!(req & KVM_REQUEST_WAIT));
224 put_cpu();

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