1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>work_on_cpu</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="ch01s06.html" title="Workqueues and Kevents"><link rel="prev" href="API-work-busy.html" title="work_busy"><link rel="next" href="ch01s07.html" title="Internal Functions"></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">work_on_cpu</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-work-busy.html">Prev</a>&#160;</td><th width="60%" align="center">Workqueues and Kevents</th><td width="20%" align="right">&#160;<a accesskey="n" href="ch01s07.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-work-on-cpu"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>work_on_cpu &#8212; 
2     run a function in user context on a particular cpu
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">long <b class="fsfunc">work_on_cpu </b>(</code></td><td>int <var class="pdparam">cpu</var>, </td></tr><tr><td>&#160;</td><td>long (*<var class="pdparam">fn</var>)
4     <code>(</code>void *<code>)</code>, </td></tr><tr><td>&#160;</td><td>void * <var class="pdparam">arg</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1107828956"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>cpu</code></em></span></dt><dd><p>
5     the cpu to run on
6    </p></dd><dt><span class="term"><em class="parameter"><code>fn</code></em></span></dt><dd><p>
7     the function to run
8    </p></dd><dt><span class="term"><em class="parameter"><code>arg</code></em></span></dt><dd><p>
9     the function arg
10    </p></dd></dl></div></div><div class="refsect1"><a name="idp1107832564"></a><h2>Description</h2><p>
11   It is up to the caller to ensure that the cpu doesn't go offline.
12   The caller must not hold any locks which would prevent <em class="parameter"><code>fn</code></em> from completing.
13</p></div><div class="refsect1"><a name="idp1107833644"></a><h2>Return</h2><p>
14   The value <em class="parameter"><code>fn</code></em> returns.
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