linux-kernel - drivers/char/random.c exported interfaces

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Date:	Mon, 18 Sep 2006 09:27:59 -0400
From:	Robin Getz <rgetz@...ckfin.uclinux.org>
To:	linux-kernel@...r.kernel.org
Subject: drivers/char/random.c exported interfaces

It says in the comments in drivers/char/random.c that:

   * Exported interfaces ---- input
   * ==============================
   *
   * The current exported interfaces for gathering environmental noise
   * from the devices are:
   *
   * 	void add_input_randomness(unsigned int type, unsigned int code,
   *                                unsigned int value);
   * 	void add_interrupt_randomness(int irq);
   *
   * add_input_randomness() uses the input layer interrupt timing, as well as
   * the event type information from the hardware.
   *
[..snip..]

If "add_input_randomness" is an "Exported interface" why is it not an
exported symbol?

If I build drivers/input/input.ko, I get the error:

** Warning: "add_input_randomness" [drivers/input/input.ko] undefined!

?

Thanks
-Robin
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