1. 根目录:
2. drivers
3. staging
4. rtl8821ae
5. compat.h

#ifndef __RTL_COMPAT_H__
#define __RTL_COMPAT_H__

#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29))
/*
 * Use this if you want to use the same suspend and resume callbacks for suspend
 * to RAM and hibernation.
 */
#define SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
struct dev_pm_ops name = { \
	.suspend = suspend_fn, \
	.resume = resume_fn, \
	.freeze = suspend_fn, \
	.thaw = resume_fn, \
	.poweroff = suspend_fn, \
	.restore = resume_fn, \
}

#define compat_pci_suspend(fn)						\
	int fn##_compat(struct pci_dev *pdev, pm_message_t state) 	\
	{								\
		int r;							\
									\
		r = fn(&pdev->dev);					\
		if (r)							\
			return r;					\
									\
		pci_save_state(pdev);					\
		pci_disable_device(pdev);				\
		pci_set_power_state(pdev, PCI_D3hot);			\
									\
		return 0;						\
	}

#define compat_pci_resume(fn)						\
	int fn##_compat(struct pci_dev *pdev)				\
	{								\
		int r;							\
									\
		pci_set_power_state(pdev, PCI_D0);			\
		r = pci_enable_device(pdev);				\
		if (r)							\
			return r;					\
		pci_restore_state(pdev);				\
									\
		return fn(&pdev->dev);					\
	}
#endif

#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39))
#define RX_FLAG_MACTIME_MPDU RX_FLAG_TSFT
#else
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
#define RX_FLAG_MACTIME_MPDU RX_FLAG_MACTIME_START
#else
#endif
//#define NETDEV_TX_OK
#endif

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0))
#define IEEE80211_KEY_FLAG_SW_MGMT IEEE80211_KEY_FLAG_SW_MGMT_TX
#endif

struct ieee80211_mgmt_compat {
	__le16 frame_control;
	__le16 duration;
	u8 da[6];
	u8 sa[6];
	u8 bssid[6];
	__le16 seq_ctrl;
	union {
		struct {
			u8 category;
			union {
				struct {
					u8 action_code;
					u8 dialog_token;
					u8 status_code;
					u8 variable[0];
				} __attribute__ ((packed)) wme_action;
				struct{
					u8 action_code;
					u8 dialog_token;
					__le16 capab;
					__le16 timeout;
					__le16 start_seq_num;
				} __attribute__((packed)) addba_req;
				struct{
					u8 action_code;
					u8 dialog_token;
					__le16 status;
					__le16 capab;
					__le16 timeout;
				} __attribute__((packed)) addba_resp;
				struct{
					u8 action_code;
					__le16 params;
					__le16 reason_code;
				} __attribute__((packed)) delba;
				struct{
					u8 action_code;
					/* capab_info for open and confirm,
					 * reason for close
					 */
					__le16 aux;
					/* Followed in plink_confirm by status
					 * code, AID and supported rates,
					 * and directly by supported rates in
					 * plink_open and plink_close
					 */
					u8 variable[0];
				} __attribute__((packed)) plink_action;
				struct{
					u8 action_code;
					u8 variable[0];
				} __attribute__((packed)) mesh_action;
				struct {
					u8 action;
					u8 smps_control;
				} __attribute__ ((packed)) ht_smps;
			} u;
		} __attribute__ ((packed)) action;
	} u;
} __attribute__ ((packed));
#endif