<p></p>
<p dir="auto">Hey, I've replaced:</p>
<pre><code>if (*p)
    __asm__ volatile("":::"memory");
</code></pre>
<p dir="auto">with</p>
<pre><code>__asm__ volatile("":: "r" (*p));
</code></pre>
<p dir="auto">which is IMHO a bit simpler and generates a single <code>mov</code> instruction (in x86 assembly), unlike trick with if (which produces 2 instructions).</p>

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