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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>vm_map_ram</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><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="re185.html" title="vm_unmap_ram" /><link rel="next" href="re187.html" title="vfree" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>vm_map_ram</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re185.html">Prev</a> </td><th width="60%" align="center">More Memory Management Functions</th><td width="20%" align="right"> <a accesskey="n" href="re187.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="vm_map_ram"><a id="API-vm-map-ram"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>vm_map_ram —
map pages linearly into kernel virtual address (vmalloc space)
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">void * <b class="fsfunc">vm_map_ram </b>(</code></td><td>struct page ** <var class="pdparam">pages</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">count</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">node</var>, </td></tr><tr><td> </td><td>pgprot_t <var class="pdparam">prot</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2978889"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>pages</code></em></span></dt><dd><p>
an array of pointers to the pages to be mapped
</p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p>
number of pages
</p></dd><dt><span class="term"><em class="parameter"><code>node</code></em></span></dt><dd><p>
prefer to allocate data structures on this node
</p></dd><dt><span class="term"><em class="parameter"><code>prot</code></em></span></dt><dd><p>
memory protection to use. PAGE_KERNEL for regular RAM
</p></dd></dl></div></div><div class="refsect1" title="Returns"><a id="id2978968"></a><h2>Returns</h2><p>
a pointer to the address that has been mapped, or <code class="constant">NULL</code> on failure
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