1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>current include/asm/current.h</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Unreliable Guide To Hacking The Linux Kernel"><link rel="up" href="common-routines.html" title="Chapter&#160;6.&#160;Common Routines"><link rel="prev" href="routines-kmalloc.html" title="kmalloc()/kfree() include/linux/slab.h"><link rel="next" href="routines-udelay.html" title="mdelay()/udelay() include/asm/delay.h include/linux/delay.h"></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"><code class="function">current</code>
2    <code class="filename">include/asm/current.h</code></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="routines-kmalloc.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;6.&#160;Common Routines</th><td width="20%" align="right">&#160;<a accesskey="n" href="routines-udelay.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="routines-current"></a><code class="function">current</code>
3    <code class="filename">include/asm/current.h</code></h2></div></div></div><p>
4    This global variable (really a macro) contains a pointer to
5    the current task structure, so is only valid in user context.
6    For example, when a process makes a system call, this will
7    point to the task structure of the calling process.  It is
8    <span class="emphasis"><em>not NULL</em></span> in interrupt context.
9   </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="routines-kmalloc.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="common-routines.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="routines-udelay.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><code class="function">kmalloc()</code>/<code class="function">kfree()</code>
10    <code class="filename">include/linux/slab.h</code>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<code class="function">mdelay()</code>/<code class="function">udelay()</code>
11     <code class="filename">include/asm/delay.h</code>
12     <code class="filename">include/linux/delay.h</code>
13   </td></tr></table></div></body></html>
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