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We can spare the irq_desc lookup in the interrupt entry code if we store the descriptor pointer in the vector array instead the interrupt number. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Bjorn Helgaas <bhelgaas@google.com> Link: http://lkml.kernel.org/r/20150802203609.717724106@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
#ifndef _ASM_X86_IRQ_H
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#define _ASM_X86_IRQ_H
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/*
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* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
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*
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* IRQ/IPI changes taken from work by Thomas Radke
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* <tomsoft@informatik.tu-chemnitz.de>
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*/
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#include <asm/apicdef.h>
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#include <asm/irq_vectors.h>
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static inline int irq_canonicalize(int irq)
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{
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return ((irq == 2) ? 9 : irq);
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}
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#ifdef CONFIG_X86_32
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extern void irq_ctx_init(int cpu);
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#else
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# define irq_ctx_init(cpu) do { } while (0)
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#endif
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#define __ARCH_HAS_DO_SOFTIRQ
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#ifdef CONFIG_HOTPLUG_CPU
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#include <linux/cpumask.h>
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extern int check_irq_vectors_for_cpu_disable(void);
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extern void fixup_irqs(void);
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extern void irq_force_complete_move(int);
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#endif
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#ifdef CONFIG_HAVE_KVM
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extern void kvm_set_posted_intr_wakeup_handler(void (*handler)(void));
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#endif
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extern void (*x86_platform_ipi_callback)(void);
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extern void native_init_IRQ(void);
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struct irq_desc;
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extern bool handle_irq(struct irq_desc *desc, struct pt_regs *regs);
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extern __visible unsigned int do_IRQ(struct pt_regs *regs);
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/* Interrupt vector management */
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extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
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extern int vector_used_by_percpu_irq(unsigned int vector);
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extern void init_ISA_irqs(void);
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#ifdef CONFIG_X86_LOCAL_APIC
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void arch_trigger_all_cpu_backtrace(bool);
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#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
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#endif
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#endif /* _ASM_X86_IRQ_H */
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