1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>might_sleep</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="ch01s09.html" title="Kernel utility functions"><link rel="prev" href="API-lower-32-bits.html" title="lower_32_bits"><link rel="next" href="API-reciprocal-scale.html" title="reciprocal_scale"></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">might_sleep</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-lower-32-bits.html">Prev</a>&#160;</td><th width="60%" align="center">Kernel utility functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-reciprocal-scale.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-might-sleep"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>might_sleep &#8212; 
2     annotation for functions that can sleep
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"> <b class="fsfunc">might_sleep </b>(</code></td><td><code>void)</code>;</td><td>&#160;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1108314196"></a><h2>Arguments</h2><p>
4  None
5 </p></div><div class="refsect1"><a name="idp1108314804"></a><h2>Description</h2><p>
6   </p><p>
7
8   this macro will print a stack trace if it is executed in an atomic
9   context (spinlock, irq-handler, ...).
10   </p><p>
11
12   This is a useful debugging help to be able to catch problems early and not
13   be bitten later when the calling function happens to sleep when it is not
14   supposed to.
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