1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>wake_up_atomic_t</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="ch01s04.html" title="Wait queues and Wake events"><link rel="prev" href="API-wake-up-bit.html" title="wake_up_bit"><link rel="next" href="ch01s05.html" title="High-resolution timers"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">wake_up_atomic_t</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-wake-up-bit.html">Prev</a>&#160;</td><th width="60%" align="center">Wait queues and Wake events</th><td width="20%" align="right">&#160;<a accesskey="n" href="ch01s05.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-wake-up-atomic-t"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>wake_up_atomic_t &#8212; 
2     Wake up a waiter on a atomic_t
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <b class="fsfunc">wake_up_atomic_t </b>(</code></td><td>atomic_t * <var class="pdparam">p</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1107477028"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>p</code></em></span></dt><dd><p>
4     The atomic_t being waited on, a kernel virtual address
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1107478628"></a><h2>Description</h2><p>
6   Wake up anyone waiting for the atomic_t to go to zero.
7   </p><p>
8
9   Abuse the bit-waker function and its waitqueue hash table set (the atomic_t
10   check is done by the waiter's wake function, not the by the waker itself).
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