Commit-ID: d4c045364d3107603187f21a56ec231e74d26441
Gitweb: http://git.kernel.org/tip/d4c045364d3107603187f21a56ec231e74d26441
Author: Ian Campbell <ian.campbell@xxxxxxxxxx>
AuthorDate: Fri, 6 Feb 2009 19:20:31 -0800
Committer: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
CommitDate: Mon, 30 Mar 2009 09:26:49 -0700
xen: add irq_from_evtchn
Given an evtchn, return the corresponding irq.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
drivers/xen/events.c | 6 ++++++
include/xen/events.h | 3 +++
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 30963af..1cd2a0e 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -151,6 +151,12 @@ static unsigned int evtchn_from_irq(unsigned irq)
return info_for_irq(irq)->evtchn;
}
+unsigned irq_from_evtchn(unsigned int evtchn)
+{
+ return evtchn_to_irq[evtchn];
+}
+EXPORT_SYMBOL_GPL(irq_from_evtchn);
+
static enum ipi_vector ipi_from_irq(unsigned irq)
{
struct irq_info *info = info_for_irq(irq);
diff --git a/include/xen/events.h b/include/xen/events.h
index 0d5f1ad..e68d59a 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -53,4 +53,7 @@ bool xen_test_irq_pending(int irq);
irq will be disabled so it won't deliver an interrupt. */
void xen_poll_irq(int irq);
+/* Determine the IRQ which is bound to an event channel */
+unsigned irq_from_evtchn(unsigned int evtchn);
+
#endif /* _XEN_EVENTS_H */
--
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