[patch 5/6] x86: irqinit - merge math_error_irq and headers

[Cyrill Gorcunov]

Though the #include's are to be cleaned up.

Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
---
 arch/x86/kernel/irqinit_32.c |    8 ++++++--
 arch/x86/kernel/irqinit_64.c |   35 +++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 2 deletions(-)

Index: linux-2.6.git/arch/x86/kernel/irqinit_32.c
===================================================================
--- linux-2.6.git.orig/arch/x86/kernel/irqinit_32.c
+++ linux-2.6.git/arch/x86/kernel/irqinit_32.c
@@ -1,19 +1,23 @@
+#include <linux/linkage.h>
 #include <linux/errno.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
+#include <linux/timex.h>
 #include <linux/slab.h>
 #include <linux/random.h>
 #include <linux/init.h>
 #include <linux/kernel_stat.h>
 #include <linux/sysdev.h>
 #include <linux/bitops.h>
+#include <linux/acpi.h>
 #include <linux/io.h>
 #include <linux/delay.h>
 
 #include <asm/atomic.h>
 #include <asm/system.h>
+#include <asm/hw_irq.h>
 #include <asm/timer.h>
 #include <asm/pgtable.h>
 #include <asm/desc.h>
@@ -22,7 +26,7 @@
 #include <asm/i8259.h>
 #include <asm/traps.h>
 
-
+#ifdef CONFIG_X86_32
 /*
  * Note that on a 486, we don't want to do a SIGFPE on an irq13
  * as the irq is unreliable, and exception 16 works correctly
@@ -34,7 +38,6 @@
  * leads to races. IBM designers who came up with it should
  * be shot.
  */
-
 static irqreturn_t math_error_irq(int cpl, void *dev_id)
 {
 	outb(0, 0xF0);
@@ -53,6 +56,7 @@ static struct irqaction fpu_irq = {
 	.mask = CPU_MASK_NONE,
 	.name = "fpu",
 };
+#endif /* CONFIG_X86_32 */
 
 /*
  * ISA PIC or low IO-APIC triggered (INTA-cycle or APIC) interrupts:
Index: linux-2.6.git/arch/x86/kernel/irqinit_64.c
===================================================================
--- linux-2.6.git.orig/arch/x86/kernel/irqinit_64.c
+++ linux-2.6.git/arch/x86/kernel/irqinit_64.c
@@ -4,6 +4,7 @@
 #include <linux/sched.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
+#include <linux/kprobes.h>
 #include <linux/timex.h>
 #include <linux/slab.h>
 #include <linux/random.h>
@@ -18,11 +19,45 @@
 #include <asm/atomic.h>
 #include <asm/system.h>
 #include <asm/hw_irq.h>
+#include <asm/timer.h>
 #include <asm/pgtable.h>
 #include <asm/desc.h>
 #include <asm/apic.h>
 #include <asm/setup.h>
 #include <asm/i8259.h>
+#include <asm/traps.h>
+
+#ifdef CONFIG_X86_32
+/*
+ * Note that on a 486, we don't want to do a SIGFPE on an irq13
+ * as the irq is unreliable, and exception 16 works correctly
+ * (ie as explained in the intel literature). On a 386, you
+ * can't use exception 16 due to bad IBM design, so we have to
+ * rely on the less exact irq13.
+ *
+ * Careful.. Not only is IRQ13 unreliable, but it is also
+ * leads to races. IBM designers who came up with it should
+ * be shot.
+ */
+static irqreturn_t math_error_irq(int cpl, void *dev_id)
+{
+	outb(0, 0xF0);
+	if (ignore_fpu_irq || !boot_cpu_data.hard_math)
+		return IRQ_NONE;
+	math_error((void __user *)get_irq_regs()->ip);
+	return IRQ_HANDLED;
+}
+
+/*
+ * New motherboards sometimes make IRQ 13 be a PCI interrupt,
+ * so allow interrupt sharing.
+ */
+static struct irqaction fpu_irq = {
+	.handler = math_error_irq,
+	.mask = CPU_MASK_NONE,
+	.name = "fpu",
+};
+#endif /* CONFIG_X86_32 */
 
 /*
  * ISA PIC or low IO-APIC triggered (INTA-cycle or APIC) interrupts:

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