1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>alloc_vm_area</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-remap-vmalloc-range.html" title="remap_vmalloc_range"><link rel="next" href="API-alloc-pages-exact-nid.html" title="alloc_pages_exact_nid"></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">alloc_vm_area</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-remap-vmalloc-range.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-alloc-pages-exact-nid.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-alloc-vm-area"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>alloc_vm_area &#8212; 
2     allocate a range of kernel address space
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 vm_struct * <b class="fsfunc">alloc_vm_area </b>(</code></td><td>size_t <var class="pdparam">size</var>, </td></tr><tr><td>&#160;</td><td>pte_t ** <var class="pdparam">ptes</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124506596"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
4     size of the area
5    </p></dd><dt><span class="term"><em class="parameter"><code>ptes</code></em></span></dt><dd><p>
6     returns the PTEs for the address space
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124509244"></a><h2>Returns</h2><p>
8   NULL on failure, vm_struct on success
9   </p><p>
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11   This function reserves a range of kernel address space, and
12   allocates pagetables to map that range.  No actual mappings
13   are created.
14   </p><p>
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16   If <em class="parameter"><code>ptes</code></em> is non-NULL, pointers to the PTEs (in init_mm)
17   allocated for the VM area are returned.
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