| From a66796ec43b2a541d725b56a612e4cacfa69b292 Mon Sep 17 00:00:00 2001 |
| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Tue, 21 Jul 2009 16:07:37 +0200 |
| Subject: [PATCH] genirq: disable random call on preempt-rt |
| |
| commit 04479b1c97ac0f63350e1825f7bd12caccc77a35 in tip. |
| |
| The random call introduces high latencies and is almost |
| unused. Disable it for -rt. |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c |
| index 87bdd6c..5cfebbe 100644 |
| --- a/kernel/irq/handle.c |
| +++ b/kernel/irq/handle.c |
| @@ -443,8 +443,11 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action) |
| action = action->next; |
| } while (action); |
| |
| +#ifndef CONFIG_PREEMPT_RT |
| + /* FIXME: Can we unbreak that ? */ |
| if (status & IRQF_SAMPLE_RANDOM) |
| add_interrupt_randomness(irq); |
| +#endif |
| local_irq_disable(); |
| |
| return retval; |
| -- |
| 1.7.1.1 |
| |
