Source of oprof.c - linux-imx - PHYTEC BitBucket (Stash)

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    return err;
}
​
static int timer_mode;
​
static int __init oprofile_init(void)
{
    int err;
​
    /* always init architecture to setup backtrace support */
    timer_mode = 0;
    err = oprofile_arch_init(&oprofile_ops);
    if (!err) {
        if (!timer && !oprofilefs_register())
            return 0;
        oprofile_arch_exit();
    }
​
    timer_mode = err || timer;  /* fall back to timer mode on errors */
    if (timer_mode) {
        if (!err)
            oprofile_arch_exit();
    /* setup timer mode: */
    timer_mode = 1;
    /* no nmi timer mode if oprofile.timer is set */
    if (timer || op_nmi_timer_init(&oprofile_ops)) {
        err = oprofile_timer_init(&oprofile_ops);
        if (err)
            return err;
    }
​
    err = oprofilefs_register();
    if (!err)
        return 0;
​
    /* failed */
    if (!timer_mode)
        oprofile_arch_exit();
​
    return err;
    return oprofilefs_register();
}
​
​
static void __exit oprofile_exit(void)
{
    oprofilefs_unregister();
    if (!timer_mode)
        oprofile_arch_exit();
}
​