e this is valid only at kernel level, no security mechanism is provided; any kernel code can get the <b>id</b> of any kernel IODevice.</font></td></tr>

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<td><font face="Helvetica"><b>Note:</b></font>&nbsp; <font face="Times">This function works only in kernel-level drivers.</font></td></tr>

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<td><font face="Helvetica" size="-1"><b>