arch/x86/kernel/tracepoint.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Code for supporting irq vector tracepoints.
   4  *
   5  * Copyright (C) 2013 Seiji Aguchi <seiji.aguchi@hds.com>
   6  *
   7  */
   8 #include <linux/jump_label.h>
   9 #include <linux/atomic.h>
  10
  11 #include <asm/hw_irq.h>
  12 #include <asm/desc.h>
  13
  14 DEFINE_STATIC_KEY_FALSE(trace_pagefault_key);
  15
  16 int trace_pagefault_reg(void)
  17 {
  18         static_branch_inc(&trace_pagefault_key);
  19         return 0;
  20 }
  21
  22 void trace_pagefault_unreg(void)
  23 {
  24         static_branch_dec(&trace_pagefault_key);
  25 }
  26
  27 #ifdef CONFIG_SMP
  28
  29 DEFINE_STATIC_KEY_FALSE(trace_resched_ipi_key);
  30
  31 int trace_resched_ipi_reg(void)
  32 {
  33         static_branch_inc(&trace_resched_ipi_key);
  34         return 0;
  35 }
  36
  37 void trace_resched_ipi_unreg(void)
  38 {
  39         static_branch_dec(&trace_resched_ipi_key);
  40 }
  41
  42 #endif