1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>__bitmap_shift_right</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="kernel-lib.html#idp1123213284" title="Bitmap Operations"><link rel="prev" href="kernel-lib.html" title="Chapter&#160;3.&#160;Basic Kernel Library Functions"><link rel="next" href="API---bitmap-shift-left.html" title="__bitmap_shift_left"></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">__bitmap_shift_right</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="kernel-lib.html">Prev</a>&#160;</td><th width="60%" align="center">Bitmap Operations</th><td width="20%" align="right">&#160;<a accesskey="n" href="API---bitmap-shift-left.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API---bitmap-shift-right"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>__bitmap_shift_right &#8212; 
2  logical right shift of the bits in a bitmap
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">void <b class="fsfunc">__bitmap_shift_right </b>(</code></td><td>unsigned long * <var class="pdparam">dst</var>, </td></tr><tr><td>&#160;</td><td>const unsigned long * <var class="pdparam">src</var>, </td></tr><tr><td>&#160;</td><td>unsigned <var class="pdparam">shift</var>, </td></tr><tr><td>&#160;</td><td>unsigned <var class="pdparam">nbits</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1123219228"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dst</code></em></span></dt><dd><p>
4     destination bitmap
5    </p></dd><dt><span class="term"><em class="parameter"><code>src</code></em></span></dt><dd><p>
6     source bitmap
7    </p></dd><dt><span class="term"><em class="parameter"><code>shift</code></em></span></dt><dd><p>
8     shift by this many bits
9    </p></dd><dt><span class="term"><em class="parameter"><code>nbits</code></em></span></dt><dd><p>
10     bitmap size, in bits
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1123223732"></a><h2>Description</h2><p>
12   Shifting right (dividing) means moving bits in the MS -&gt; LS bit
13   direction.  Zeros are fed into the vacated MS positions and the
14   LS bits shifted off the bottom are lost.
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