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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-06 14:09:41 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-09 12:16:05 +0100 |
| commit | 7c1d7cdcef1b54f4a78892b6b99d19f12c4f398e (patch) | |
| tree | b682c8a8d4ee0cf00de2ee6d00cd8fea37ad6339 /arch/x86/kernel/irq.c | |
| parent | 9b2b76a3344146c4d8d300874e73af8161204f87 (diff) | |
| download | kernel_samsung_crespo-7c1d7cdcef1b54f4a78892b6b99d19f12c4f398e.zip kernel_samsung_crespo-7c1d7cdcef1b54f4a78892b6b99d19f12c4f398e.tar.gz kernel_samsung_crespo-7c1d7cdcef1b54f4a78892b6b99d19f12c4f398e.tar.bz2 | |
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/x86/kernel/irq.c')
| -rw-r--r-- | arch/x86/kernel/irq.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index 8b30d0c..f13ca16 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); |