arch/x86/kernel/irq_work.c

   1 /*
   2  * x86 specific code for irq_work
   3  *
   4  * Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/irq_work.h>
   9 #include <linux/hardirq.h>
  10 #include <asm/apic.h>
  11 #include <trace/events/irq_vectors.h>
  12
  13 void smp_irq_work_interrupt(struct pt_regs *regs)
  14 {
  15         irq_enter();
  16         ack_APIC_irq();
  17         trace_irq_vector_entry(IRQ_WORK_VECTOR);
  18         inc_irq_stat(apic_irq_work_irqs);
  19         irq_work_run();
  20         trace_irq_vector_exit(IRQ_WORK_VECTOR);
  21         irq_exit();
  22 }
  23
  24 void arch_irq_work_raise(void)
  25 {
  26 #ifdef CONFIG_X86_LOCAL_APIC
  27         if (!cpu_has_apic)
  28                 return;
  29
  30         apic->send_IPI_self(IRQ_WORK_VECTOR);
  31         apic_wait_icr_idle();
  32 #endif
  33 }