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510         y="461.83929">r4 = READ_ONCE(b);</tspan></text>
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520         x="686.27747"
521         y="669.26422">r5 = READ_ONCE(e);</tspan></text>
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530         id="tspan4431-9-4-2"
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532         y="445.04358">rcu_read_lock();</tspan></text>
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543         y="684.53094">rcu_read_unlock();</tspan></text>
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635         id="tspan4463-2-0"
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637         y="213.91006">thread4()</tspan></text>
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640