init.c

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#include <linux/kernel.h>
#include <linux/oprofile.h>
#include <linux/init.h>
#include <linux/errno.h>
 
extern int perfmon_init(struct oprofile_operations *ops);
extern void perfmon_exit(void);
extern void ia64_backtrace(struct pt_regs * const regs, unsigned int depth);

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

#ifdef CONFIG_PERFMON
    /* perfmon_init() can fail, but we have no way to report it */
    ret = perfmon_init(ops);
#endif
    ops->backtrace = ia64_backtrace;

    return ret;
}


void oprofile_arch_exit(void)
{
#ifdef CONFIG_PERFMON
    perfmon_exit();
#endif
}