[PATCH] i386/x86_64: Remove global IO_APIC_VECTOR

Which vector an irq is assigned to now varies dynamically and is
not needed outside of io_apic.c.  So remove the possibility
of accessing the information outside of io_apic.c and remove
the silly macro that makes looking for users of irq_vector
difficult.

The fact this compiles ensures there aren't any more pieces
of the old CONFIG_PCI_MSI weirdness that I failed to remove.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 10 insertions, 15 deletions

diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
index b7287fb499f3..cd082c36ca03 100644
--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -1184,8 +1184,8 @@ static int __assign_irq_vector(int irq)
 
         BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
 
-        if (IO_APIC_VECTOR(irq) > 0)
-                return IO_APIC_VECTOR(irq);
+        if (irq_vector[irq] > 0)
+                return irq_vector[irq];
 
         current_vector += 8;
         if (current_vector == SYSCALL_VECTOR)
@@ -1199,7 +1199,7 @@ static int __assign_irq_vector(int irq)
         }
 
         vector = current_vector;
-        IO_APIC_VECTOR(irq) = vector;
+        irq_vector[irq] = vector;
 
         return vector;
 }
@@ -1967,7 +1967,7 @@ static void ack_ioapic_quirk_irq(unsigned int irq)
  * operation to prevent an edge-triggered interrupt escaping meanwhile.
  * The idea is from Manfred Spraul.  --macro
  */
-        i = IO_APIC_VECTOR(irq);
+        i = irq_vector[irq];
 
         v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1));
 
@@ -1984,7 +1984,7 @@ static void ack_ioapic_quirk_irq(unsigned int irq)
 
 static int ioapic_retrigger_irq(unsigned int irq)
 {
-        send_IPI_self(IO_APIC_VECTOR(irq));
+        send_IPI_self(irq_vector[irq]);
 
         return 1;
 }
@@ -2020,7 +2020,7 @@ static inline void init_IO_APIC_traps(void)
          */
         for (irq = 0; irq < NR_IRQS ; irq++) {
                 int tmp = irq;
-                if (IO_APIC_IRQ(tmp) && !IO_APIC_VECTOR(tmp)) {
+                if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
                         /*
                          * Hmm.. We don't have an entry for this,
                          * so default to an old-fashioned 8259
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 91728d9d3472..9c3b9b19d699 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -587,8 +587,8 @@ static int __assign_irq_vector(int irq, cpumask_t mask)
 
         BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
 
-        if (IO_APIC_VECTOR(irq) > 0)
-                old_vector = IO_APIC_VECTOR(irq);
+        if (irq_vector[irq] > 0)
+                old_vector = irq_vector[irq];
         if ((old_vector > 0) && cpu_isset(old_vector >> 8, mask)) {
                 return old_vector;
         }
@@ -620,7 +620,7 @@ next:
                 }
                 per_cpu(vector_irq, cpu)[vector] = irq;
                 vector |= cpu << 8;
-                IO_APIC_VECTOR(irq) = vector;
+                irq_vector[irq] = vector;
                 return vector;
         }
         return -ENOSPC;
@@ -1289,7 +1289,7 @@ static inline void init_IO_APIC_traps(void)
          */
         for (irq = 0; irq < NR_IRQS ; irq++) {
                 int tmp = irq;
-                if (IO_APIC_IRQ(tmp) && !IO_APIC_VECTOR(tmp)) {
+                if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
                         /*
                          * Hmm.. We don't have an entry for this,
                          * so default to an old-fashioned 8259
diff --git a/include/asm-i386/hw_irq.h b/include/asm-i386/hw_irq.h
index 8806c7e002a7..0bedbdf5e907 100644
--- a/include/asm-i386/hw_irq.h
+++ b/include/asm-i386/hw_irq.h
@@ -26,9 +26,6 @@
  * Interrupt entry/exit code at both C and assembly level
  */
 
-extern u8 irq_vector[NR_IRQ_VECTORS];
-#define IO_APIC_VECTOR(irq)     (irq_vector[irq])
-
 extern void (*interrupt[NR_IRQS])(void);
 
 #ifdef CONFIG_SMP
diff --git a/include/asm-x86_64/hw_irq.h b/include/asm-x86_64/hw_irq.h
index 53d0d9fd10d6..792dd52fcd70 100644
--- a/include/asm-x86_64/hw_irq.h
+++ b/include/asm-x86_64/hw_irq.h
@@ -74,10 +74,8 @@
 
 
 #ifndef __ASSEMBLY__
-extern unsigned int irq_vector[NR_IRQ_VECTORS];
 typedef int vector_irq_t[NR_VECTORS];
 DECLARE_PER_CPU(vector_irq_t, vector_irq);
-#define IO_APIC_VECTOR(irq)     (irq_vector[irq])
 
 /*
  * Various low-level irq details needed by irq.c, process.c,