[PATCH] htirq: tidy up the htirq code

This moves the declarations for the architecture helpers into
include/linux/htirq.h from the generic include/linux/pci.h.  Hopefully this
will make this distinction clearer.

htirq.h is included where it is needed.

The dependency on the msi code is fixed and removed.

The Makefile is tidied up.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg KH <greg@kroah.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/io_apic.c

@@ -33,6 +33,7 @@
 #include <linux/sysdev.h>
 #include <linux/pci.h>
 #include <linux/msi.h>
+#include <linux/htirq.h>
 
 #include <asm/io.h>
 #include <asm/smp.h>
@@ -2409,9 +2410,8 @@ static int __init ioapic_init_sysfs(void)
 
 device_initcall(ioapic_init_sysfs);
 
-#ifdef CONFIG_PCI_MSI
 /*
- * Dynamic irq allocate and deallocation for MSI
+ * Dynamic irq allocate and deallocation
  */
 int create_irq(void)
 {
@@ -2450,7 +2450,6 @@ void destroy_irq(unsigned int irq)
 	irq_vector[irq] = 0;
 	spin_unlock_irqrestore(&vector_lock, flags);
 }
-#endif /* CONFIG_PCI_MSI */
 
 /*
  * MSI mesage composition

arch/x86_64/kernel/io_apic.c

@@ -31,6 +31,7 @@
 #include <linux/acpi.h>
 #include <linux/sysdev.h>
 #include <linux/msi.h>
+#include <linux/htirq.h>
 #ifdef CONFIG_ACPI
 #include <acpi/acpi_bus.h>
 #endif

drivers/pci/Kconfig

@@ -55,7 +55,6 @@ config PCI_DEBUG
 config HT_IRQ
 	bool "Interrupts on hypertransport devices"
 	default y
-	depends on PCI_MSI
 	depends on X86_LOCAL_APIC && X86_IO_APIC
 	help
 	   This allows native hypertransport devices to use interrupts.

drivers/pci/Makefile

@@ -17,6 +17,9 @@ obj-$(CONFIG_HOTPLUG_PCI) += hotplug/
 # Build the PCI MSI interrupt support
 obj-$(CONFIG_PCI_MSI) += msi.o
 
+# Build the Hypertransport interrupt support
+obj-$(CONFIG_HT_IRQ) += htirq.o
+
 #
 # Some architectures use the generic PCI setup functions
 #
@@ -29,7 +32,6 @@ obj-$(CONFIG_PPC32) += setup-irq.o
 obj-$(CONFIG_PPC64) += setup-bus.o
 obj-$(CONFIG_MIPS) += setup-bus.o setup-irq.o
 obj-$(CONFIG_X86_VISWS) += setup-irq.o
-obj-$(CONFIG_HT_IRQ) += htirq.o
 
 #
 # ACPI Related PCI FW Functions

drivers/pci/htirq.c

@@ -11,6 +11,7 @@
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/gfp.h>
+#include <linux/htirq.h>
 
 /* Global ht irq lock.
  *

include/linux/htirq.h

@@ -0,0 +1,15 @@
+#ifndef LINUX_HTIRQ_H
+#define LINUX_HTIRQ_H
+
+/* Helper functions.. */
+void write_ht_irq_low(unsigned int irq, u32 data);
+void write_ht_irq_high(unsigned int irq, u32 data);
+u32  read_ht_irq_low(unsigned int irq);
+u32  read_ht_irq_high(unsigned int irq);
+void mask_ht_irq(unsigned int irq);
+void unmask_ht_irq(unsigned int irq);
+
+/* The arch hook for getting things started */
+int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev);
+
+#endif /* LINUX_HTIRQ_H */

include/linux/pci.h

@@ -615,20 +615,9 @@ extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
 #endif
 
 #ifdef CONFIG_HT_IRQ
-/* Helper functions.. */
-void write_ht_irq_low(unsigned int irq, u32 data);
-void write_ht_irq_high(unsigned int irq, u32 data);
-u32  read_ht_irq_low(unsigned int irq);
-u32  read_ht_irq_high(unsigned int irq);
-void mask_ht_irq(unsigned int irq);
-void unmask_ht_irq(unsigned int irq);
-
 /* The functions a driver should call */
 int  ht_create_irq(struct pci_dev *dev, int idx);
 void ht_destroy_irq(unsigned int irq);
-
-/* The arch hook for getting things started */
-int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev);
 #endif /* CONFIG_HT_IRQ */
 
 extern void pci_block_user_cfg_access(struct pci_dev *dev);