arch/x86/kernel/tracepoint.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2013 Seiji Aguchi <seiji.aguchi@hds.com>
   4  */
   5 #include <linux/jump_label.h>
   6 #include <linux/atomic.h>
   7
   8 #include <asm/trace/exceptions.h>
   9
  10 DEFINE_STATIC_KEY_FALSE(trace_pagefault_key);
  11
  12 int trace_pagefault_reg(void)
  13 {
  14         static_branch_inc(&trace_pagefault_key);
  15         return 0;
  16 }
  17
  18 void trace_pagefault_unreg(void)
  19 {
  20         static_branch_dec(&trace_pagefault_key);
  21 }