Sophie: kernel-doc-3.11.10-100.fc18 noarch

kernel-doc-3.11.10-100.fc18.noarch.rpm

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>yield</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-sched-setscheduler.html" title="sched_setscheduler" /><link rel="next" href="API-yield-to.html" title="yield_to" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">yield</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-sched-setscheduler.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-yield-to.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="API-yield"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>yield &#8212; 
     yield the current processor to other threads.
 </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 __sched <strong class="fsfunc">yield </strong>(</code></td><td> <var class="pdparam">void</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a id="idm140404969200384"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>void</code></em></span></dt><dd><p>
     no arguments
    </p></dd></dl></div></div><div class="refsect1"><a id="idm140404969197328"></a><h2>Description</h2><p>
   </p><p>

   Do not ever use this function, there's a 99% chance you're doing it wrong.
   </p><p>

   The scheduler is at all times free to pick the calling task as the most
   eligible task to run, if removing the <code class="function">yield</code> call from your code breaks
   it, its already broken.
</p></div><div class="refsect1"><a id="idm140404969194816"></a><h2>Typical broken usage is</h2><p>
   </p><p>

   while (!event)
   <code class="function">yield</code>;
   </p><p>

   where one assumes that <code class="function">yield</code> will let 'the other' process run that will
   make event true. If the current task is a SCHED_FIFO task that will never
   happen. Never use <code class="function">yield</code> as a progress guarantee!!
   </p><p>

   If you want to use <code class="function">yield</code> to wait for something, use <code class="function">wait_event</code>.
   If you want to use <code class="function">yield</code> to be 'nice' for others, use <code class="function">cond_resched</code>.
   If you still want to use <code class="function">yield</code>, do not!
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