linux-4.4.1/cdev_add() の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-4.4.1/cdev_add() へ行く。
  • 1 (2016-04-16 (土) 16:06:44)

参照元†

• linux-4.4.1/__register_chrdev()
• linux-4.4.1/__video_register_device()

説明†

• パス: linux-4.4.1/fs/char_dev.c

• FIXME: これは何？
  • 説明

引数†

• struct cdev *p
  • linux-4.4.1/cdev
• dev_t dev
  • linux-4.4.1/dev_t
• unsigned count

返り値†

• int

参考†

実装†

/**
 * cdev_add() - add a char device to the system
 * @p: the cdev structure for the device
 * @dev: the first device number for which this device is responsible
 * @count: the number of consecutive minor numbers corresponding to this
 *         device
 *
 * cdev_add() adds the device represented by @p to the system, making it
 * live immediately.  A negative error code is returned on failure.
 */
int cdev_add(struct cdev *p, dev_t dev, unsigned count)
{
        int error;

        p->dev = dev;
        p->count = count;

        error = kobj_map(cdev_map, dev, count, NULL,
                         exact_match, exact_lock, p);
        if (error)
                return error;

• • linux-4.4.1/kobj_map()
  • linux-4.4.1/cdev_map(global)
  • linux-4.4.1/exact_match()
  • linux-4.4.1/exact_lock()

        kobject_get(p->kobj.parent);

• • linux-4.4.1/kobject_get()

        return 0;
}

コメント†