PNP: introduce pnp_irq_mask_t typedef

This adds a typedef for the IRQ bitmap, which should cause
no functional change, but will make it easier to pass a
pointer to a bitmap to pnp_register_irq_resource().

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index 3126e45..a9ee0a9 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -30,8 +30,10 @@
 };
 
 #define PNP_IRQ_NR 256
+typedef struct { DECLARE_BITMAP(bits, PNP_IRQ_NR); } pnp_irq_mask_t;
+
 struct pnp_irq {
-	DECLARE_BITMAP(map, PNP_IRQ_NR);	/* bitmask for IRQ lines */
+	pnp_irq_mask_t map;	/* bitmap for IRQ lines */
 	unsigned char flags;	/* IRQ flags */
 	unsigned char pad;	/* pad */
 	struct pnp_irq *next;	/* next IRQ */