1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>__wake_up</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-wait-on-atomic-t.html" title="wait_on_atomic_t"><link rel="next" href="API---wake-up-sync-key.html" title="__wake_up_sync_key"></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</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-wait-on-atomic-t.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="API---wake-up-sync-key.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API---wake-up"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>__wake_up &#8212; 
2  wake up threads blocked on a waitqueue.
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 </b>(</code></td><td>wait_queue_head_t * <var class="pdparam">q</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">mode</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">nr_exclusive</var>, </td></tr><tr><td>&#160;</td><td>void * <var class="pdparam">key</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1107426220"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>q</code></em></span></dt><dd><p>
4     the waitqueue
5    </p></dd><dt><span class="term"><em class="parameter"><code>mode</code></em></span></dt><dd><p>
6     which threads
7    </p></dd><dt><span class="term"><em class="parameter"><code>nr_exclusive</code></em></span></dt><dd><p>
8     how many wake-one or wake-many threads to wake up
9    </p></dd><dt><span class="term"><em class="parameter"><code>key</code></em></span></dt><dd><p>
10     is directly passed to the wakeup function
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1107430740"></a><h2>Description</h2><p>
12   It may be assumed that this function implies a write memory barrier before
13   changing the task state if and only if any tasks are woken up.
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