[PATCH] genirq: x86_64 irq: Remove the msi assumption that irq == vector

This patch removes the change in behavior of the irq allocation code when
CONFIG_PCI_MSI is defined.  Removing all instances of the assumption that irq
== vector.

create_irq is rewritten to first allocate a free irq and then to assign that
irq a vector.

assign_irq_vector is made static and the AUTO_ASSIGN case which allocates an
vector not bound to an irq is removed.

The ioapic vector methods are removed, and everything now works with irqs.

The definition of NR_IRQS no longer depends on CONFIG_PCI_MSI

Signed-off-by: Eric 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: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 0 insertions, 46 deletions

diff --git a/include/asm-x86_64/hw_irq.h b/include/asm-x86_64/hw_irq.h
index f5da94af9c41..1a8dc185a79f 100644
--- a/include/asm-x86_64/hw_irq.h
+++ b/include/asm-x86_64/hw_irq.h
@@ -75,7 +75,6 @@
 #ifndef __ASSEMBLY__
 extern u8 irq_vector[NR_IRQ_VECTORS];
 #define IO_APIC_VECTOR(irq)     (irq_vector[irq])
-#define AUTO_ASSIGN             -1
 
 /*
  * Various low-level irq details needed by irq.c, process.c,
diff --git a/include/asm-x86_64/io_apic.h b/include/asm-x86_64/io_apic.h
index 5d1b5c68e36e..df579ac29a1e 100644
--- a/include/asm-x86_64/io_apic.h
+++ b/include/asm-x86_64/io_apic.h
@@ -10,45 +10,7 @@
  * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
  */
 
-#ifdef CONFIG_PCI_MSI
-static inline int use_pci_vector(void)  {return 1;}
-static inline void disable_edge_ioapic_vector(unsigned int vector) { }
-static inline void mask_and_ack_level_ioapic_vector(unsigned int vector) { }
-static inline void end_edge_ioapic_vector (unsigned int vector) { }
-#define startup_level_ioapic    startup_level_ioapic_vector
-#define shutdown_level_ioapic   mask_IO_APIC_vector
-#define enable_level_ioapic     unmask_IO_APIC_vector
-#define disable_level_ioapic    mask_IO_APIC_vector
-#define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_vector
-#define end_level_ioapic        end_level_ioapic_vector
-#define set_ioapic_affinity     set_ioapic_affinity_vector
-
-#define startup_edge_ioapic     startup_edge_ioapic_vector
-#define shutdown_edge_ioapic    disable_edge_ioapic_vector
-#define enable_edge_ioapic      unmask_IO_APIC_vector
-#define disable_edge_ioapic     disable_edge_ioapic_vector
-#define ack_edge_ioapic         ack_edge_ioapic_vector
-#define end_edge_ioapic         end_edge_ioapic_vector
-#else
 static inline int use_pci_vector(void)  {return 0;}
-static inline void disable_edge_ioapic_irq(unsigned int irq) { }
-static inline void mask_and_ack_level_ioapic_irq(unsigned int irq) { }
-static inline void end_edge_ioapic_irq (unsigned int irq) { }
-#define startup_level_ioapic    startup_level_ioapic_irq
-#define shutdown_level_ioapic   mask_IO_APIC_irq
-#define enable_level_ioapic     unmask_IO_APIC_irq
-#define disable_level_ioapic    mask_IO_APIC_irq
-#define mask_and_ack_level_ioapic mask_and_ack_level_ioapic_irq
-#define end_level_ioapic        end_level_ioapic_irq
-#define set_ioapic_affinity     set_ioapic_affinity_irq
-
-#define startup_edge_ioapic     startup_edge_ioapic_irq
-#define shutdown_edge_ioapic    disable_edge_ioapic_irq
-#define enable_edge_ioapic      unmask_IO_APIC_irq
-#define disable_edge_ioapic     disable_edge_ioapic_irq
-#define ack_edge_ioapic         ack_edge_ioapic_irq
-#define end_edge_ioapic         end_edge_ioapic_irq
-#endif
 
 #define APIC_MISMATCH_DEBUG
 
@@ -207,8 +169,6 @@ extern int timer_uses_ioapic_pin_0;
 
 extern int sis_apic_bug; /* dummy */ 
 
-extern int assign_irq_vector(int irq);
-
 void enable_NMI_through_LVT0 (void * dummy);
 
 extern spinlock_t i8259A_lock;
diff --git a/include/asm-x86_64/irq.h b/include/asm-x86_64/irq.h
index 43469d8ab71a..b8f87287847f 100644
--- a/include/asm-x86_64/irq.h
+++ b/include/asm-x86_64/irq.h
@@ -31,13 +31,8 @@
 
 #define FIRST_SYSTEM_VECTOR     0xef   /* duplicated in hw_irq.h */
 
-#ifdef CONFIG_PCI_MSI
-#define NR_IRQS FIRST_SYSTEM_VECTOR
-#define NR_IRQ_VECTORS NR_IRQS
-#else
 #define NR_IRQS 224
 #define NR_IRQ_VECTORS (32 * NR_CPUS)
-#endif
 
 static __inline__ int irq_canonicalize(int irq)
 {