1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>mod_timer_pinned</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="ch01s03.html" title="Delaying, scheduling, and timer routines"><link rel="prev" href="API-mod-timer.html" title="mod_timer"><link rel="next" href="API-add-timer.html" title="add_timer"></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">mod_timer_pinned</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-mod-timer.html">Prev</a>&#160;</td><th width="60%" align="center">Delaying, scheduling, and timer routines</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-add-timer.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-mod-timer-pinned"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>mod_timer_pinned &#8212; 
2     modify a timer's timeout
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">int <b class="fsfunc">mod_timer_pinned </b>(</code></td><td>struct timer_list * <var class="pdparam">timer</var>, </td></tr><tr><td>&#160;</td><td>unsigned long <var class="pdparam">expires</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1107038980"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>timer</code></em></span></dt><dd><p>
4     the timer to be modified
5    </p></dd><dt><span class="term"><em class="parameter"><code>expires</code></em></span></dt><dd><p>
6     new timeout in jiffies
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1107041540"></a><h2>Description</h2><p>
8   <code class="function">mod_timer_pinned</code> is a way to update the expire field of an
9   active timer (if the timer is inactive it will be activated)
10   and to ensure that the timer is scheduled on the current CPU.
11   </p><p>
12
13   Note that this does not prevent the timer from being migrated
14   when the current CPU goes offline.  If this is a problem for
15   you, use CPU-hotplug notifiers to handle it correctly, for
16   example, cancelling the timer when the corresponding CPU goes
17   offline.
18   </p><p>
19
20   mod_timer_pinned(timer, expires) is equivalent to:
21   </p><p>
22
23   del_timer(timer); timer-&gt;expires = expires; add_timer(timer);
24</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-mod-timer.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch01s03.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-add-timer.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">mod_timer</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">add_timer</span></td></tr></table></div></body></html>
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