From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:30 -0500
Subject: drivers: random: Reduce preempt disabled region

No need to keep preemption disabled across the whole function.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 drivers/char/random.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -676,9 +676,12 @@ static void add_timer_randomness(struct
 	preempt_disable();
 	/* if over the trickle threshold, use only 1 in 4096 samples */
 	if (input_pool.entropy_count > trickle_thresh &&
-	    ((__this_cpu_inc_return(trickle_count) - 1) & 0xfff))
-		goto out;
+	    ((__this_cpu_inc_return(trickle_count) - 1) & 0xfff)) {
+		preempt_enable();
+		return;
+	}
 
+	preempt_enable();
 	sample.jiffies = jiffies;
 	sample.cycles = get_cycles();
 	sample.num = num;
@@ -719,8 +722,6 @@ static void add_timer_randomness(struct
 		credit_entropy_bits(&input_pool,
 				    min_t(int, fls(delta>>1), 11));
 	}
-out:
-	preempt_enable();
 }
 
 void add_input_randomness(unsigned int type, unsigned int code,