Reuse existing code instead of using inline asm.
Make the code more concise and clear in the TSC
synchronization part.
Signed-off-by: NDenis Plotnikov <dplotnikov@virtuozzo.com>
Reviewed-by: NRoman Kagan <rkagan@virtuozzo.com>
Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com>