1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>mark_buffer_dirty</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Filesystems API"><link rel="up" href="other_functions.html" title="Other Functions"><link rel="prev" href="API-sync-mapping-buffers.html" title="sync_mapping_buffers"><link rel="next" href="API---bread-gfp.html" title="__bread_gfp"></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">mark_buffer_dirty</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-sync-mapping-buffers.html">Prev</a>&#160;</td><th width="60%" align="center">Other Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API---bread-gfp.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-mark-buffer-dirty"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>mark_buffer_dirty &#8212; 
2     mark a buffer_head as needing writeout
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">mark_buffer_dirty </b>(</code></td><td>struct buffer_head * <var class="pdparam">bh</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1102259268"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>bh</code></em></span></dt><dd><p>
4     the buffer_head to mark dirty
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1102260876"></a><h2>Description</h2><p>
6   <code class="function">mark_buffer_dirty</code> will set the dirty bit against the buffer, then set its
7   backing page dirty, then tag the page as dirty in its address_space's radix
8   tree and then attach the address_space's inode to its superblock's dirty
9   inode list.
10   </p><p>
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12   <code class="function">mark_buffer_dirty</code> is atomic.  It takes bh-&gt;b_page-&gt;mapping-&gt;private_lock,
13   mapping-&gt;tree_lock and mapping-&gt;host-&gt;i_lock.
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