[PATCH 2/5] RFC genirq: add function to retrieve timestamp from irqdesc

[Torben Hohn <torbenh@gmx.de>]

this is probably not useful.
and will be superceded by other functions.
its just here to ilustrate my initial idea.

Signed-off-by: Torben Hohn <torbenh@gmx.de>
---
 kernel/irq/manage.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e9df1f0..adbf6c9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1176,3 +1176,12 @@ int request_any_context_irq(unsigned int irq, irq_handler_t handler,
 	return !ret ? IRQC_IS_HARDIRQ : ret;
 }
 EXPORT_SYMBOL_GPL(request_any_context_irq);
+
+void retreive_irq_timestamp(unsigned int irq, struct timespec *ts)
+{
+	struct irq_desc *desc = irq_to_desc(irq);
+
+	*ts = desc->last_timestamp;
+}
+EXPORT_SYMBOL_GPL(retreive_irq_timestamp);
+
-- 
1.7.2.3