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how to make /dev/random work?

To: Kernel Newbies <kernelnewbies@nl.linux.org>, Linux MIPS Mailing List <linux-mips@linux-mips.org>
Subject: how to make /dev/random work?
From: loody <miloody@gmail.com>
Date: Fri, 28 Aug 2009 14:41:41 +0800
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Dear all:
I made linux running on Mips machine.
Right now I found the /dev/random doesn't work properly, since I use
"dd if=/dev/random of=/tmp/random.txt", it stops working.
If I use "cat /dev/random", it will not pop out anything.

Is there any setting I forget while make menuconfig or should i add
another driver for /dev/random such that I can make /dev/random work?
appreciate your help,
miloody

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