<sect1><title>Common Pitfalls</title>

	<indexterm><primary>refund policy</primary></indexterm>

	<para>Before I send you on your way to go out into the world and write kernel modules, there are a few things I need to warn
	you about. If I fail to warn you and something bad happens, please report the problem to me for a full refund of the amount I
	was paid for your copy of the book.</para>

	<indexterm><primary>standard libraries</primary></indexterm>
	<indexterm><primary>libraries</primary><secondary>standard</secondary></indexterm>
	<indexterm><primary>/proc/kallsyms</primary></indexterm>
	<indexterm><primary>proc file</primary><secondary>kallsyms</secondary></indexterm>
	<indexterm><primary>interrupts</primary><secondary>disabling</secondary></indexterm>
	<indexterm><primary>carnivore</primary><secondary>large</secondary></indexterm>

	<variablelist>

 		<varlistentry><term>Using standard libraries</term>
			<listitem><para>You can't do that.  In a kernel module you can only use kernel functions, which are the functions you can
			see in <filename>/proc/kallsyms</filename>.</para></listitem></varlistentry>

		<varlistentry><term>Disabling interrupts</term>
			<listitem><para>You might need to do this for a short time and that is OK, but if you don't enable them afterwards, your
			system will be stuck and you'll have to power it off.</para></listitem> </varlistentry>
	
		<varlistentry><term>Sticking your head inside a large carnivore</term>
			<listitem><para>I probably don't have to warn you about this, but I figured I will anyway, just in case.</para></listitem>
			</varlistentry>

	</variablelist>
			
</sect1>



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