Evolution of the x86 context switch in Linux (2018)
Enjoyed this article, anybody know the significance of adding the do..while(0) loop within the macro starting Linux 1.3?<p>Was curious if it guards against some C pre-processor issues.<p><pre><code>  /** include/asm-i386/system.h */
  #define switch_to(tsk) do {
    [...]
  } while (0)</code></pre>