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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>mark_buffer_dirty</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Filesystems API" /><link rel="up" href="ch01s06.html" title="Other Functions" /><link rel="prev" href="re83.html" title="sync_mapping_buffers" /><link rel="next" href="re85.html" title="__bread" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>mark_buffer_dirty</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re83.html">Prev</a> </td><th width="60%" align="center">Other Functions</th><td width="20%" align="right"> <a accesskey="n" href="re85.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="mark_buffer_dirty"><a id="API-mark-buffer-dirty"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>mark_buffer_dirty —
mark a buffer_head as needing writeout
</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">mark_buffer_dirty </b>(</code></td><td>struct buffer_head * <var class="pdparam">bh</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3108982"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>bh</code></em></span></dt><dd><p>
the buffer_head to mark dirty
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3109008"></a><h2>Description</h2><p>
<code class="function">mark_buffer_dirty</code> will set the dirty bit against the buffer, then set its
backing page dirty, then tag the page as dirty in its address_space's radix
tree and then attach the address_space's inode to its superblock's dirty
inode list.
</p><p>
<code class="function">mark_buffer_dirty</code> is atomic. It takes bh->b_page->mapping->private_lock,
mapping->tree_lock and the global inode_lock.
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