1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>disk_map_sector_rcu</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="blkdev.html" title="Chapter&#160;14.&#160;Block Devices"><link rel="prev" href="API-disk-part-iter-exit.html" title="disk_part_iter_exit"><link rel="next" href="API-register-blkdev.html" title="register_blkdev"></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">disk_map_sector_rcu</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-disk-part-iter-exit.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;14.&#160;Block Devices</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-register-blkdev.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-disk-map-sector-rcu"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>disk_map_sector_rcu &#8212; 
2     map sector to partition
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">struct hd_struct * <b class="fsfunc">disk_map_sector_rcu </b>(</code></td><td>struct gendisk * <var class="pdparam">disk</var>, </td></tr><tr><td>&#160;</td><td>sector_t <var class="pdparam">sector</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1129022764"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>disk</code></em></span></dt><dd><p>
4     gendisk of interest
5    </p></dd><dt><span class="term"><em class="parameter"><code>sector</code></em></span></dt><dd><p>
6     sector to map
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1129025396"></a><h2>Description</h2><p>
8   Find out which partition <em class="parameter"><code>sector</code></em> maps to on <em class="parameter"><code>disk</code></em>.  This is
9   primarily used for stats accounting.
10</p></div><div class="refsect1"><a name="idp1129026796"></a><h2>CONTEXT</h2><p>
11   RCU read locked.  The returned partition pointer is valid only
12   while preemption is disabled.
13</p></div><div class="refsect1"><a name="idp1129027500"></a><h2>RETURNS</h2><p>
14   Found partition on success, part0 is returned if no partition matches
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