eliminate NR_IRQ_VECTORS

Index: 2008-11-20/xen/arch/x86/acpi/boot.c
===================================================================
@@ -601,7 +601,7 @@ static int __init acpi_parse_madt_ioapic
 
 	count =
 	    acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
-				  NR_IRQ_VECTORS);
+				  MAX_IRQ_SOURCES);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX
 		       "Error parsing interrupt source overrides entry\n");

@@ -623,7 +623,7 @@ static int __init acpi_parse_madt_ioapic
 
 	count =
 	    acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
-				  NR_IRQ_VECTORS);
+				  MAX_IRQ_SOURCES);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 		/* TBD: Cleanup to allow fallback to MPS */

Index: 2008-11-20/xen/arch/x86/io_apic.c
===================================================================
@@ -665,7 +665,7 @@ static inline int IO_APIC_irq_trigger(in
 }
 
 /* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
-u8 irq_vector[NR_IRQ_VECTORS] __read_mostly;
+u8 irq_vector[NR_IRQS] __read_mostly;
 
 int free_irq_vector(int vector)
 {

@@ -686,7 +686,7 @@ int assign_irq_vector(int irq)
     static unsigned current_vector = FIRST_DYNAMIC_VECTOR;
     unsigned vector;
 
-    BUG_ON(irq >= NR_IRQ_VECTORS);
+    BUG_ON(irq >= NR_IRQS);
 
     spin_lock(&vector_lock);
 

Index: 2008-11-20/xen/include/asm-x86/irq.h
===================================================================
@@ -18,7 +18,7 @@
 #define vector_to_irq(vec)  (vector_irq[vec])
 
 extern int vector_irq[NR_VECTORS];
-extern u8 irq_vector[NR_IRQ_VECTORS];
+extern u8 irq_vector[NR_IRQS];
 #define AUTO_ASSIGN    -1
 #define NEVER_ASSIGN   -2
 #define FREE_TO_ASSIGN -3

Index: 2008-11-20/xen/include/asm-x86/mach-default/irq_vectors.h
===================================================================
@@ -32,6 +32,5 @@
 
 /* Limited by number of trap vectors. */
 #define NR_IRQS        NR_VECTORS
-#define NR_IRQ_VECTORS NR_IRQS
 
 #endif /* _ASM_IRQ_VECTORS_H */