[PATCH] genirq: ia64 irq: Dynamic irq support

[akpm@osdl.org: build fix]
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rajesh Shah <rajesh.shah@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/ia64/kernel/irq_ia64.c

@@ -30,6 +30,7 @@
 #include <linux/smp_lock.h>
 #include <linux/threads.h>
 #include <linux/bitops.h>
+#include <linux/irq.h>
 
 #include <asm/delay.h>
 #include <asm/intrinsics.h>
@@ -105,6 +106,25 @@ reserve_irq_vector (int vector)
 	return test_and_set_bit(pos, ia64_vector_mask);
 }
 
+/*
+ * Dynamic irq allocate and deallocation for MSI
+ */
+int create_irq(void)
+{
+	int vector = assign_irq_vector(AUTO_ASSIGN);
+
+	if (vector >= 0)
+		dynamic_irq_init(vector);
+
+	return vector;
+}
+
+void destroy_irq(unsigned int irq)
+{
+	dynamic_irq_cleanup(irq);
+	free_irq_vector(irq);
+}
+
 #ifdef CONFIG_SMP
 #	define IS_RESCHEDULE(vec)	(vec == IA64_IPI_RESCHEDULE)
 #else