arch/x86/kernel/tracepoint.c

   1 /*
   2  * Code for supporting irq vector tracepoints.
   3  *
   4  * Copyright (C) 2013 Seiji Aguchi <seiji.aguchi@hds.com>
   5  *
   6  */
   7 #include <linux/jump_label.h>
   8 #include <linux/atomic.h>
   9
  10 #include <asm/hw_irq.h>
  11 #include <asm/desc.h>
  12
  13 DEFINE_STATIC_KEY_FALSE(trace_pagefault_key);
  14
  15 int trace_pagefault_reg(void)
  16 {
  17         static_branch_inc(&trace_pagefault_key);
  18         return 0;
  19 }
  20
  21 void trace_pagefault_unreg(void)
  22 {
  23         static_branch_dec(&trace_pagefault_key);
  24 }
  25
  26 #ifdef CONFIG_SMP
  27
  28 DEFINE_STATIC_KEY_FALSE(trace_resched_ipi_key);
  29
  30 int trace_resched_ipi_reg(void)
  31 {
  32         static_branch_inc(&trace_resched_ipi_key);
  33         return 0;
  34 }
  35
  36 void trace_resched_ipi_unreg(void)
  37 {
  38         static_branch_dec(&trace_resched_ipi_key);
  39 }
  40
  41 #endif