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authorVoss, Nikolaus <N.Voss@weinmann.de>2008-07-18 14:44:48 +0200
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-07-25 14:31:29 +0200
commit56d3eef2b49b06618981c87edba16a607bf10ddd (patch)
tree99c105d080bd52414dee7ca7d049a17991272948
parentdb6ea2c17cef531a58f48c51c3a0892edcaf1380 (diff)
avr32: allow system timer to share interrupt to make OProfile work
The following patch allows the avr32_comparator interrupt to be shared. This is necessary as the avr32 oprofile driver shares the irq group 0 with the timer. To make OProfile actually work on AVR32, a small patch for oprofiled is also needed (posted to the oprofile mailing list). Signed-off-by: Nikolaus Voss <n.voss@weinmann.de> [haavard.skinnemoen@atmel.com: set IRQF_SHARED unconditionally] Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
-rw-r--r--arch/avr32/kernel/time.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c
index abd954fb7ba..7e7f32771ae 100644
--- a/arch/avr32/kernel/time.c
+++ b/arch/avr32/kernel/time.c
@@ -43,6 +43,9 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evdev = dev_id;
+ if (unlikely(!(intc_get_pending(0) & 1)))
+ return IRQ_NONE;
+
/*
* Disable the interrupt until the clockevent subsystem
* reprograms it.
@@ -55,7 +58,8 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
static struct irqaction timer_irqaction = {
.handler = timer_interrupt,
- .flags = IRQF_TIMER | IRQF_DISABLED,
+ /* Oprofile uses the same irq as the timer, so allow it to be shared */
+ .flags = IRQF_TIMER | IRQF_DISABLED | IRQF_SHARED,
.name = "avr32_comparator",
};