From c14971bf887dc7aaa85788f71f8c4bdf93d2b7a5 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Wed, 16 Mar 2016 21:27:07 +0000
Subject: [xen] Use generic test_and_clear_bit() function

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 src/include/ipxe/xen.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/include')

diff --git a/src/include/ipxe/xen.h b/src/include/ipxe/xen.h
index eac1145ad..0fb8b7625 100644
--- a/src/include/ipxe/xen.h
+++ b/src/include/ipxe/xen.h
@@ -13,6 +13,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 #define __XEN_INTERFACE_VERSION__ 0x00040400
 
 #include <stdint.h>
+#include <ipxe/bitops.h>
 #include <ipxe/uaccess.h>
 #include <xen/xen.h>
 #include <xen/event_channel.h>
@@ -58,6 +59,19 @@ struct xen_hypervisor {
 	struct xen_store store;
 };
 
+/**
+ * Test and clear pending event
+ *
+ * @v xen		Xen hypervisor
+ * @v port		Event channel port
+ * @ret pending		Event was pending
+ */
+static inline __attribute__ (( always_inline )) int
+xenevent_pending ( struct xen_hypervisor *xen, evtchn_port_t port ) {
+
+	return test_and_clear_bit ( port, xen->shared->evtchn_pending );
+}
+
 #include <bits/xen.h>
 
 /**
-- 
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