1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>local_irq_save()/local_irq_restore() include/linux/irqflags.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-endian.html" title="cpu_to_be32()/be32_to_cpu()/cpu_to_le32()/le32_to_cpu() include/asm/byteorder.h"><link rel="next" href="routines-softirqs.html" title="local_bh_disable()/local_bh_enable() include/linux/interrupt.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">local_irq_save()</code>/<code class="function">local_irq_restore()</code>
2    <code class="filename">include/linux/irqflags.h</code>
3   </th></tr><tr><td width="20%" align="left"><a accesskey="p" href="routines-endian.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-softirqs.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-local-irqs"></a><code class="function">local_irq_save()</code>/<code class="function">local_irq_restore()</code>
4    <code class="filename">include/linux/irqflags.h</code>
5   </h2></div></div></div><p>
6    These routines disable hard interrupts on the local CPU, and
7    restore them.  They are reentrant; saving the previous state in
8    their one <code class="varname">unsigned long flags</code> argument.  If you
9    know that interrupts are enabled, you can simply use
10    <code class="function">local_irq_disable()</code> and
11    <code class="function">local_irq_enable()</code>.
12   </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="routines-endian.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-softirqs.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><code class="function">cpu_to_be32()</code>/<code class="function">be32_to_cpu()</code>/<code class="function">cpu_to_le32()</code>/<code class="function">le32_to_cpu()</code>
13     <code class="filename">include/asm/byteorder.h</code>
14   &#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">local_bh_disable()</code>/<code class="function">local_bh_enable()</code>
15    <code class="filename">include/linux/interrupt.h</code></td></tr></table></div></body></html>
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