1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>remap_pfn_range</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="ch04s03.html" title="More Memory Management Functions"><link rel="prev" href="API-vm-insert-pfn.html" title="vm_insert_pfn"><link rel="next" href="API-vm-iomap-memory.html" title="vm_iomap_memory"></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">remap_pfn_range</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-vm-insert-pfn.html">Prev</a>&#160;</td><th width="60%" align="center">More Memory Management Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-vm-iomap-memory.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-remap-pfn-range"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>remap_pfn_range &#8212; 
2     remap kernel memory to userspace
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">int <b class="fsfunc">remap_pfn_range </b>(</code></td><td>struct vm_area_struct * <var class="pdparam">vma</var>, </td></tr><tr><td>&#160;</td><td>unsigned long <var class="pdparam">addr</var>, </td></tr><tr><td>&#160;</td><td>unsigned long <var class="pdparam">pfn</var>, </td></tr><tr><td>&#160;</td><td>unsigned long <var class="pdparam">size</var>, </td></tr><tr><td>&#160;</td><td>pgprot_t <var class="pdparam">prot</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124300796"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>vma</code></em></span></dt><dd><p>
4     user vma to map to
5    </p></dd><dt><span class="term"><em class="parameter"><code>addr</code></em></span></dt><dd><p>
6     target user address to start at
7    </p></dd><dt><span class="term"><em class="parameter"><code>pfn</code></em></span></dt><dd><p>
8     physical address of kernel memory
9    </p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
10     size of map area
11    </p></dd><dt><span class="term"><em class="parameter"><code>prot</code></em></span></dt><dd><p>
12     page protection flags for this mapping
13    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124306508"></a><h2>Note</h2><p>
14   this is only safe if the mm semaphore is held when called.
15</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-vm-insert-pfn.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch04s03.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-vm-iomap-memory.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">vm_insert_pfn</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">vm_iomap_memory</span></td></tr></table></div></body></html>
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