rt-patches/0054-genirq-Disable-irqpoll-on-rt.patch

   1 From e062b6555d0b1733def3211262d296c6fcc603e3 Mon Sep 17 00:00:00 2001
   2 From: Ingo Molnar <mingo@elte.hu>
   3 Date: Fri, 3 Jul 2009 08:29:57 -0500
   4 Subject: [PATCH 054/366] genirq: Disable irqpoll on -rt
   5
   6 Creates long latencies for no value
   7
   8 Signed-off-by: Ingo Molnar <mingo@elte.hu>
   9 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  10 ---
  11  kernel/irq/spurious.c | 8 ++++++++
  12  1 file changed, 8 insertions(+)
  13
  14 diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
  15 index 3214417..ed26f25 100644
  16 --- a/kernel/irq/spurious.c
  17 +++ b/kernel/irq/spurious.c
  18 @@ -444,6 +444,10 @@ MODULE_PARM_DESC(noirqdebug, "Disable irq lockup detection when true");
  19
  20  static int __init irqfixup_setup(char *str)
  21  {
  22 +#ifdef CONFIG_PREEMPT_RT_BASE
  23 +       pr_warn("irqfixup boot option not supported w/ CONFIG_PREEMPT_RT_BASE\n");
  24 +       return 1;
  25 +#endif
  26         irqfixup = 1;
  27         printk(KERN_WARNING "Misrouted IRQ fixup support enabled.\n");
  28         printk(KERN_WARNING "This may impact system performance.\n");
  29 @@ -456,6 +460,10 @@ module_param(irqfixup, int, 0644);
  30
  31  static int __init irqpoll_setup(char *str)
  32  {
  33 +#ifdef CONFIG_PREEMPT_RT_BASE
  34 +       pr_warn("irqpoll boot option not supported w/ CONFIG_PREEMPT_RT_BASE\n");
  35 +       return 1;
  36 +#endif
  37         irqfixup = 2;
  38         printk(KERN_WARNING "Misrouted IRQ fixup and polling support "
  39                                 "enabled\n");
  40 --
  41 1.9.1
  42