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init.c

/**
 * @file init.c
 *
 * @remark Copyright 2002 OProfile authors
 * @remark Read the file COPYING
 *
 * @author John Levon <levon@movementarian.org>
 */

#include <linux/oprofile.h>
#include <linux/init.h>
#include <linux/errno.h>
 
/* We support CPUs that have performance counters like the Pentium Pro
 * with the NMI mode driver.
 */
 
extern int op_nmi_init(struct oprofile_operations * ops);
extern int op_nmi_timer_init(struct oprofile_operations * ops);
extern void op_nmi_exit(void);
extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);


int __init oprofile_arch_init(struct oprofile_operations * ops)
{
      int ret;

      ret = -ENODEV;

#ifdef CONFIG_X86_LOCAL_APIC
      ret = op_nmi_init(ops);
#endif
#ifdef CONFIG_X86_IO_APIC
      if (ret < 0)
            ret = op_nmi_timer_init(ops);
#endif
      ops->backtrace = x86_backtrace;

      return ret;
}


void oprofile_arch_exit(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
      op_nmi_exit();
#endif
}

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