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x86: unify do_IRQ()

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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>
This commit is contained in:
Jeremy Fitzhardinge 2009-02-06 14:09:41 -08:00 committed by Ingo Molnar
parent 9b2b76a334
commit 7c1d7cdcef
4 changed files with 40 additions and 61 deletions
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3
arch/x86/include/asm/irq.h
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@ -36,11 +36,12 @@ static inline int irq_canonicalize(int irq)
extern void fixup_irqs(void); extern void fixup_irqs(void);
#endif #endif
extern unsigned int do_IRQ(struct pt_regs *regs);
extern void init_IRQ(void); extern void init_IRQ(void);
extern void native_init_IRQ(void); extern void native_init_IRQ(void);
extern bool handle_irq(unsigned irq, struct pt_regs *regs); extern bool handle_irq(unsigned irq, struct pt_regs *regs);
extern unsigned int do_IRQ(struct pt_regs *regs);
/* Interrupt vector management */ /* Interrupt vector management */
extern DECLARE_BITMAP(used_vectors, NR_VECTORS); extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
extern int vector_used_by_percpu_irq(unsigned int vector); extern int vector_used_by_percpu_irq(unsigned int vector);

38
arch/x86/kernel/irq.c
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@ -6,10 +6,12 @@
#include <linux/kernel_stat.h> #include <linux/kernel_stat.h>
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/smp.h> #include <linux/smp.h>
#include <linux/ftrace.h>
#include <asm/apic.h> #include <asm/apic.h>
#include <asm/io_apic.h> #include <asm/io_apic.h>
#include <asm/irq.h> #include <asm/irq.h>
#include <asm/idle.h>
atomic_t irq_err_count; atomic_t irq_err_count;
@ -188,4 +190,40 @@ u64 arch_irq_stat(void)
return sum; 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); EXPORT_SYMBOL_GPL(vector_used_by_percpu_irq);

27
arch/x86/kernel/irq_32.c
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@ -211,33 +211,6 @@ bool handle_irq(unsigned irq, struct pt_regs *regs)
return true; 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 #ifdef CONFIG_HOTPLUG_CPU
#include <asm/genapic.h> #include <asm/genapic.h>

33
arch/x86/kernel/irq_64.c
View File

@ -62,39 +62,6 @@ bool handle_irq(unsigned irq, struct pt_regs *regs)
return true; 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 #ifdef CONFIG_HOTPLUG_CPU
/* A cpu has been removed from cpu_online_mask. Reset irq affinities. */ /* A cpu has been removed from cpu_online_mask. Reset irq affinities. */
void fixup_irqs(void) void fixup_irqs(void)