<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!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>Chapter 6. Locking on SMP</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux generic IRQ handling" /><link rel="up" href="index.html" title="Linux generic IRQ handling" /><link rel="prev" href="ch05.html" title="Chapter 5. __do_IRQ entry point" /><link rel="next" href="ch07.html" title="Chapter 7. Structures" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 6. Locking on SMP</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch05.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="ch07.html">Next</a></td></tr></table><hr /></div><div class="chapter" title="Chapter 6. Locking on SMP"><div class="titlepage"><div><div><h2 class="title"><a id="locking"></a>Chapter 6. Locking on SMP</h2></div></div></div><p> The locking of chip registers is up to the architecture that defines the chip primitives. There is a chip->lock field that can be used for serialization, but the generic layer does not touch it. The per-irq structure is protected via desc->lock, by the generic layer. </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch05.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="ch07.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 5. __do_IRQ entry point </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 7. Structures</td></tr></table></div></body></html>