KVM: cleanup kvm trace
This patch does: - no need call tracepoint_synchronize_unregister() when kvm module is unloaded since ftrace can handle it - cleanup ftrace's macro Signed-off-by: NXiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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