| Message ID | 20170511034013.GB14071@fergus.ozlabs.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index f0fe9d0..f72b8a0 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -192,7 +192,7 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req) int i, cpu, me; cpumask_var_t cpus; bool called = true; - bool wait = req & KVM_REQUEST_WAIT; + bool __maybe_unused wait = req & KVM_REQUEST_WAIT; struct kvm_vcpu *vcpu; zalloc_cpumask_var(&cpus, GFP_ATOMIC);
Commit 7a97cec26b94 ("KVM: mark requests that need synchronization", 2017-04-27) added a variable 'wait' to kvm_make_all_cpus_request(), which is only consumed in calls to smp_call_function_many. When the kernel is compiled with CONFIG_SMP=n, smp_call_function_many() turns into a macro which doesn't use the 'wait' argument, leading to a warning about the variable 'wait' being unused: /home/paulus/kernel/kvm/arch/powerpc/kvm/../../../virt/kvm/kvm_main.c: In function ‘kvm_make_all_cpus_request’: /home/paulus/kernel/kvm/arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:195:7: error: unused variable ‘wait’ [-Werror=unused-variable] bool wait = req & KVM_REQUEST_WAIT; ^ Since PPC compiles everything that gets built under arch/powerpc with -Werror by default, this causes the build to fail. This fixes it by adding a __maybe_unused annotation to the declaration of 'wait'. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> --- virt/kvm/kvm_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)