arch/x86/oprofile/init.c

   1 /**
   2  * @file init.c
   3  *
   4  * @remark Copyright 2002 OProfile authors
   5  * @remark Read the file COPYING
   6  *
   7  * @author John Levon <levon@movementarian.org>
   8  */
   9
  10 #include <linux/oprofile.h>
  11 #include <linux/init.h>
  12 #include <linux/errno.h>
  13
  14 /*
  15  * We support CPUs that have performance counters like the Pentium Pro
  16  * with the NMI mode driver.
  17  */
  18
  19 #ifdef CONFIG_X86_LOCAL_APIC
  20 extern int op_nmi_init(struct oprofile_operations *ops);
  21 extern void op_nmi_exit(void);
  22 #else
  23 static int op_nmi_init(struct oprofile_operations *ops) { return -ENODEV; }
  24 static void op_nmi_exit(void) { }
  25 #endif
  26
  27 extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
  28
  29 int __init oprofile_arch_init(struct oprofile_operations *ops)
  30 {
  31         ops->backtrace = x86_backtrace;
  32         return op_nmi_init(ops);
  33 }
  34
  35 void oprofile_arch_exit(void)
  36 {
  37         op_nmi_exit();
  38 }