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Subject: genirq: Disable irqpoll on -rt
From: Ingo Molnar <mingo@elte.hu>
Date: Fri Jul 3 08:29:57 2009 -0500
From: Ingo Molnar <mingo@elte.hu>
Creates long latencies for no value
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/irq/spurious.c | 8 ++++++++
1 file changed, 8 insertions(+)
---
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index c481d8458325..ca4bdc53d6c7 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -447,6 +447,10 @@ MODULE_PARM_DESC(noirqdebug, "Disable irq lockup detection when true");
static int __init irqfixup_setup(char *str)
{
+#ifdef CONFIG_PREEMPT_RT
+ pr_warn("irqfixup boot option not supported w/ CONFIG_PREEMPT_RT\n");
+ return 1;
+#endif
irqfixup = 1;
printk(KERN_WARNING "Misrouted IRQ fixup support enabled.\n");
printk(KERN_WARNING "This may impact system performance.\n");
@@ -459,6 +463,10 @@ module_param(irqfixup, int, 0644);
static int __init irqpoll_setup(char *str)
{
+#ifdef CONFIG_PREEMPT_RT
+ pr_warn("irqpoll boot option not supported w/ CONFIG_PREEMPT_RT\n");
+ return 1;
+#endif
irqfixup = 2;
printk(KERN_WARNING "Misrouted IRQ fixup and polling support "
"enabled\n");
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