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authorJeremy Fitzhardinge <jeremy@goop.org>2009-02-06 14:09:41 -0800
committerIngo Molnar <mingo@elte.hu>2009-02-09 12:16:05 +0100
commit7c1d7cdcef1b54f4a78892b6b99d19f12c4f398e (patch)
treeb682c8a8d4ee0cf00de2ee6d00cd8fea37ad6339 /arch
parent9b2b76a3344146c4d8d300874e73af8161204f87 (diff)
x86: unify do_IRQ()
With the differences in interrupt handling hoisted into handle_irq(), do_IRQ is more or less identical between 32 and 64 bit, so unify it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/irq.h3
-rw-r--r--arch/x86/kernel/irq.c38
-rw-r--r--arch/x86/kernel/irq_32.c27
-rw-r--r--arch/x86/kernel/irq_64.c33
4 files changed, 40 insertions, 61 deletions
diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index d0f6f7d1771c..107eb2196691 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -36,11 +36,12 @@ static inline int irq_canonicalize(int irq)
extern void fixup_irqs(void);
#endif
-extern unsigned int do_IRQ(struct pt_regs *regs);
extern void init_IRQ(void);
extern void native_init_IRQ(void);
extern bool handle_irq(unsigned irq, struct pt_regs *regs);
+extern unsigned int do_IRQ(struct pt_regs *regs);
+
/* Interrupt vector management */
extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
extern int vector_used_by_percpu_irq(unsigned int vector);
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 8b30d0c2512c..f13ca1650aaf 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -6,10 +6,12 @@
#include <linux/kernel_stat.h>
#include <linux/seq_file.h>
#include <linux/smp.h>
+#include <linux/ftrace.h>
#include <asm/apic.h>
#include <asm/io_apic.h>
#include <asm/irq.h>
+#include <asm/idle.h>
atomic_t irq_err_count;
@@ -188,4 +190,40 @@ u64 arch_irq_stat(void)
return sum;
}
+
+/*
+ * do_IRQ handles all normal device IRQ's (the special
+ * SMP cross-CPU interrupts have their own specific
+ * handlers).
+ */
+unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ /* high bit used in ret_from_ code */
+ unsigned vector = ~regs->orig_ax;
+ unsigned irq;
+
+ exit_idle();
+ irq_enter();
+
+ irq = __get_cpu_var(vector_irq)[vector];
+
+ if (!handle_irq(irq, regs)) {
+#ifdef CONFIG_X86_64
+ if (!disable_apic)
+ ack_APIC_irq();
+#endif
+
+ if (printk_ratelimit())
+ printk(KERN_EMERG "%s: %d.%d No irq handler for vector (irq %d)\n",
+ __func__, smp_processor_id(), vector, irq);
+ }
+
+ irq_exit();
+
+ set_irq_regs(old_regs);
+ return 1;
+}
+
EXPORT_SYMBOL_GPL(vector_used_by_percpu_irq);
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 61f09fb969ee..4beb9a13873d 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -211,33 +211,6 @@ bool handle_irq(unsigned irq, struct pt_regs *regs)
return true;
}
-/*
- * do_IRQ handles all normal device IRQ's (the special
- * SMP cross-CPU interrupts have their own specific
- * handlers).
- */
-unsigned int do_IRQ(struct pt_regs *regs)
-{
- struct pt_regs *old_regs;
- /* high bit used in ret_from_ code */
- unsigned vector = ~regs->orig_ax;
- unsigned irq;
-
- old_regs = set_irq_regs(regs);
- irq_enter();
- irq = __get_cpu_var(vector_irq)[vector];
-
- if (!handle_irq(irq, regs)) {
- printk(KERN_EMERG "%s: cannot handle IRQ %d vector %#x cpu %d\n",
- __func__, irq, vector, smp_processor_id());
- BUG();
- }
-
- irq_exit();
- set_irq_regs(old_regs);
- return 1;
-}
-
#ifdef CONFIG_HOTPLUG_CPU
#include <asm/genapic.h>
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index a93f3b0dc7f2..977d8b43a0dd 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -62,39 +62,6 @@ bool handle_irq(unsigned irq, struct pt_regs *regs)
return true;
}
-/*
- * do_IRQ handles all normal device IRQ's (the special
- * SMP cross-CPU interrupts have their own specific
- * handlers).
- */
-asmlinkage unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
-
- /* high bit used in ret_from_ code */
- unsigned vector = ~regs->orig_ax;
- unsigned irq;
-
- exit_idle();
- irq_enter();
-
- irq = __get_cpu_var(vector_irq)[vector];
-
- if (!handle_irq(irq, regs)) {
- if (!disable_apic)
- ack_APIC_irq();
-
- if (printk_ratelimit())
- printk(KERN_EMERG "%s: %d.%d No irq handler for vector\n",
- __func__, smp_processor_id(), vector);
- }
-
- irq_exit();
-
- set_irq_regs(old_regs);
- return 1;
-}
-
#ifdef CONFIG_HOTPLUG_CPU
/* A cpu has been removed from cpu_online_mask. Reset irq affinities. */
void fixup_irqs(void)