kvm: avoid unused variable warning for UP builds
The uniprocessor version of smp_call_function_many does not evaluate all of its argument, and the compiler emits a warning about "wait" being unused. This breaks the build on architectures for which "-Werror" is enabled by default. Work around it by moving the invocation of smp_call_function_many to its own inline function. Reported-by: NPaul Mackerras <paulus@ozlabs.org> Cc: stable@vger.kernel.org Fixes: 7a97cec2Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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