licitly</em> express 
the intention, either as a comment 
(<code>/* fall through */</code>) or 
as an attribute (<code>__attribute__((fallthrough))</code>).</p>
<pre><code class="language-diff">+++ b/kernel/compat.c
@@ -346,8 +346,11 @@ get_compat_sigset(...)
                return -EFAULT;
        switch (_NSIG_WORDS) {
        case 4: set-&gt;sig[3] = v.sig[6] | (((long)v.sig[7]) &lt;&lt; 32 );
+               /* fall through */
        case 3: set-&gt;sig[2] = v.sig[4] | (((long)v.sig[5]) &lt;&lt; 32 );
