From d8f0df50e5449782d2823ea788fa5e8dc48a4473 Mon Sep 17 00:00:00 2001

From: Florian Westphal <fw@strlen.de>

Date: Sun, 22 Mar 2009 15:09:07 +0100

Subject: [PATCH] Disable PRNG entropy accounting.

The real fix is to either completely replace random.c,

providing our own implementation using ns-3 rng infrastructure,

or feed the prng periodically.

---

 drivers/char/random.c |   10 +++++++++-

 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c

index 7c13581..1efc24e 100644

--- a/drivers/char/random.c

+++ b/drivers/char/random.c

@@ -766,7 +766,15 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min,

 		      int reserved)

 {

 	unsigned long flags;

-

+#ifdef CONFIG_NSC

+	/*

+	 * prevent infinite loop: if a code path calls get_random_bytes

+	 * and we've run out of entropy, this calls wake_up_interruptible(),

+	 * which calls the code path again, which calls get_random_bytes,

+	 * which calls wake_up which...

+	 */

+	return nbytes;

+#endif

 	/* Hold lock while accounting */

 	spin_lock_irqsave(&r->lock, flags);

-- 

1.6.0.6