diff --git a/target/linux/ar71xx/Makefile b/target/linux/ar71xx/Makefile
index 3f5bc6724..6d5b4c52b 100644
--- a/target/linux/ar71xx/Makefile
+++ b/target/linux/ar71xx/Makefile
@@ -13,7 +13,7 @@ FEATURES:=usbgadget
 CPU_TYPE:=24kc
 SUBTARGETS:=generic nand mikrotik
 
-KERNEL_PATCHVER:=4.4
+KERNEL_PATCHVER:=4.9
 
 include $(INCLUDE_DIR)/target.mk
 
diff --git a/target/linux/ar71xx/config-4.4 b/target/linux/ar71xx/config-4.4
index 1f4d9f4c3..4793bf4de 100644
--- a/target/linux/ar71xx/config-4.4
+++ b/target/linux/ar71xx/config-4.4
@@ -223,8 +223,8 @@ CONFIG_ATH79_MACH_UBNT=y
 CONFIG_ATH79_MACH_UBNT_UNIFIAC=y
 CONFIG_ATH79_MACH_UBNT_XM=y
 CONFIG_ATH79_MACH_WEIO=y
-CONFIG_ATH79_MACH_WHR_HP_G300N=y
 # CONFIG_ATH79_MACH_WI2A_AC200I is not set
+CONFIG_ATH79_MACH_WHR_HP_G300N=y
 CONFIG_ATH79_MACH_WLAE_AG300N=y
 CONFIG_ATH79_MACH_WLR8100=y
 CONFIG_ATH79_MACH_WNDAP360=y
@@ -374,7 +374,6 @@ CONFIG_MIPS_CLOCK_VSYSCALL=y
 CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER=y
 # CONFIG_MIPS_CMDLINE_FROM_DTB is not set
 # CONFIG_MIPS_ELF_APPENDED_DTB is not set
-CONFIG_MIPS_FPU_EMULATOR=y
 # CONFIG_MIPS_HUGE_TLB_SUPPORT is not set
 CONFIG_MIPS_L1_CACHE_SHIFT=5
 CONFIG_MIPS_MACHINE=y
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c25-v1.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c25-v1.c
index 9e08c157e..c6c646322 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c25-v1.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c25-v1.c
@@ -35,15 +35,15 @@
 #define ARCHER_C25_GPIO_SHIFT_SRCLR	19 /* MR,   Master Reset */
 #define ARCHER_C25_GPIO_SHIFT_RCLK	16 /* STCP, Storage Reg Clock Input */
 
-#define ARCHER_C25_74HC_GPIO_BASE		QCA956X_GPIO_COUNT
-#define ARCHER_C25_74HC_GPIO_LED_WAN_AMBER	27
-#define ARCHER_C25_74HC_GPIO_LED_WAN_GREEN	28
-#define ARCHER_C25_74HC_GPIO_LED_WLAN2		29
-#define ARCHER_C25_74HC_GPIO_LED_WLAN5		30
-#define ARCHER_C25_74HC_GPIO_LED_LAN1		23
-#define ARCHER_C25_74HC_GPIO_LED_LAN2		24
-#define ARCHER_C25_74HC_GPIO_LED_LAN3		25
-#define ARCHER_C25_74HC_GPIO_LED_LAN4		26
+#define ARCHER_C25_74HC_GPIO_BASE		32
+#define ARCHER_C25_74HC_GPIO_LED_WAN_AMBER	(ARCHER_C25_74HC_GPIO_BASE + 4)
+#define ARCHER_C25_74HC_GPIO_LED_WAN_GREEN	(ARCHER_C25_74HC_GPIO_BASE + 5)
+#define ARCHER_C25_74HC_GPIO_LED_WLAN2		(ARCHER_C25_74HC_GPIO_BASE + 6)
+#define ARCHER_C25_74HC_GPIO_LED_WLAN5		(ARCHER_C25_74HC_GPIO_BASE + 7)
+#define ARCHER_C25_74HC_GPIO_LED_LAN1		(ARCHER_C25_74HC_GPIO_BASE + 0)
+#define ARCHER_C25_74HC_GPIO_LED_LAN2		(ARCHER_C25_74HC_GPIO_BASE + 1)
+#define ARCHER_C25_74HC_GPIO_LED_LAN3		(ARCHER_C25_74HC_GPIO_BASE + 2)
+#define ARCHER_C25_74HC_GPIO_LED_LAN4		(ARCHER_C25_74HC_GPIO_BASE + 3)
 
 #define ARCHER_C25_V1_SSR_BIT_0			0
 #define ARCHER_C25_V1_SSR_BIT_1			1
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c59-v1.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c59-v1.c
index da15919a5..3c85a2055 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c59-v1.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c59-v1.c
@@ -43,15 +43,15 @@
 #define ARCHER_C59_GPIO_SHIFT_SRCLR		19
 #define ARCHER_C59_GPIO_SHIFT_RCLK		20
 
-#define ARCHER_C59_74HC_GPIO_BASE		QCA956X_GPIO_COUNT
-#define ARCHER_C59_74HC_GPIO_LED_POWER		23
-#define ARCHER_C59_74HC_GPIO_LED_WLAN2		24
-#define ARCHER_C59_74HC_GPIO_LED_WLAN5		25
-#define ARCHER_C59_74HC_GPIO_LED_LAN		26
-#define ARCHER_C59_74HC_GPIO_LED_WAN_GREEN	27
-#define ARCHER_C59_74HC_GPIO_LED_WAN_AMBER	28
-#define ARCHER_C59_74HC_GPIO_LED_WPS		29
-#define ARCHER_C59_74HC_GPIO_LED_USB		30
+#define ARCHER_C59_74HC_GPIO_BASE		32
+#define ARCHER_C59_74HC_GPIO_LED_POWER		(ARCHER_C59_74HC_GPIO_BASE + 0)
+#define ARCHER_C59_74HC_GPIO_LED_WLAN2		(ARCHER_C59_74HC_GPIO_BASE + 1)
+#define ARCHER_C59_74HC_GPIO_LED_WLAN5		(ARCHER_C59_74HC_GPIO_BASE + 2)
+#define ARCHER_C59_74HC_GPIO_LED_LAN		(ARCHER_C59_74HC_GPIO_BASE + 3)
+#define ARCHER_C59_74HC_GPIO_LED_WAN_GREEN	(ARCHER_C59_74HC_GPIO_BASE + 4)
+#define ARCHER_C59_74HC_GPIO_LED_WAN_AMBER	(ARCHER_C59_74HC_GPIO_BASE + 5)
+#define ARCHER_C59_74HC_GPIO_LED_WPS		(ARCHER_C59_74HC_GPIO_BASE + 6)
+#define ARCHER_C59_74HC_GPIO_LED_USB		(ARCHER_C59_74HC_GPIO_BASE + 7)
 
 #define ARCHER_C59_V1_SSR_BIT_0			0
 #define ARCHER_C59_V1_SSR_BIT_1			1
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c7-v4.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c7-v4.c
index 64955c799..21b8e8cf8 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c7-v4.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c7-v4.c
@@ -56,7 +56,7 @@
 #define ARCHER_C7_GPIO_LED_USB1		7
 #define ARCHER_C7_GPIO_LED_USB2		8
 
-#define ARCHER_C7_74HC_GPIO_BASE	QCA956X_GPIO_COUNT
+#define ARCHER_C7_74HC_GPIO_BASE	32
 #define ARCHER_C7_GPIO_LED_WPS		(ARCHER_C7_74HC_GPIO_BASE + 0)
 #define ARCHER_C7_GPIO_LED_LAN1		(ARCHER_C7_74HC_GPIO_BASE + 1)
 #define ARCHER_C7_GPIO_LED_LAN2		(ARCHER_C7_74HC_GPIO_BASE + 2)
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
index 64f927dc6..691566fa8 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
@@ -53,7 +53,7 @@
 #define RB91X_FLAG_USB		BIT(0)
 #define RB91X_FLAG_PCIE		BIT(1)
 
-#define RB91X_LATCH_GPIO_BASE	AR934X_GPIO_COUNT
+#define RB91X_LATCH_GPIO_BASE	32
 #define RB91X_LATCH_GPIO(_x)	(RB91X_LATCH_GPIO_BASE + (_x))
 
 #define RB91X_SSR_GPIO_BASE	(RB91X_LATCH_GPIO_BASE + AR934X_GPIO_COUNT)
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr942n-v1.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr942n-v1.c
index 76f6a0759..32e2bc952 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr942n-v1.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr942n-v1.c
@@ -49,15 +49,15 @@
 #define TL_WR942N_V1_GPIO_LED_WPS		21
 #define TL_WR942N_V1_GPIO_LED_STATUS		22
 
-#define TL_WR942N_V1_74HC_GPIO_BASE		QCA956X_GPIO_COUNT
-#define TL_WR942N_V1_74HC_GPIO_LED_LAN4		23
-#define TL_WR942N_V1_74HC_GPIO_LED_LAN3		24
-#define TL_WR942N_V1_74HC_GPIO_LED_LAN2		25
-#define TL_WR942N_V1_74HC_GPIO_LED_LAN1		26
-#define TL_WR942N_V1_74HC_GPIO_LED_WAN_GREEN	27
-#define TL_WR942N_V1_74HC_GPIO_LED_WAN_AMBER	28
-#define TL_WR942N_V1_74HC_GPIO_LED_WLAN		29
-#define TL_WR942N_V1_74HC_GPIO_HUB_RESET	30 /* from u-boot sources */
+#define TL_WR942N_V1_74HC_GPIO_BASE		32
+#define TL_WR942N_V1_74HC_GPIO_LED_LAN4		(TL_WR942N_V1_74HC_GPIO_BASE + 0)
+#define TL_WR942N_V1_74HC_GPIO_LED_LAN3		(TL_WR942N_V1_74HC_GPIO_BASE + 1)
+#define TL_WR942N_V1_74HC_GPIO_LED_LAN2		(TL_WR942N_V1_74HC_GPIO_BASE + 2)
+#define TL_WR942N_V1_74HC_GPIO_LED_LAN1		(TL_WR942N_V1_74HC_GPIO_BASE + 3)
+#define TL_WR942N_V1_74HC_GPIO_LED_WAN_GREEN	(TL_WR942N_V1_74HC_GPIO_BASE + 4)
+#define TL_WR942N_V1_74HC_GPIO_LED_WAN_AMBER	(TL_WR942N_V1_74HC_GPIO_BASE + 5)
+#define TL_WR942N_V1_74HC_GPIO_LED_WLAN		(TL_WR942N_V1_74HC_GPIO_BASE + 6)
+#define TL_WR942N_V1_74HC_GPIO_HUB_RESET	(TL_WR942N_V1_74HC_GPIO_BASE + 7) /* from u-boot sources */
 
 #define TL_WR942N_V1_SSR_BIT_0			0
 #define TL_WR942N_V1_SSR_BIT_1			1
diff --git a/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c b/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c
index b397575f7..5bbe9789f 100644
--- a/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c
+++ b/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c
@@ -39,9 +39,31 @@
 
 struct rb4xx_nand_info {
 	struct nand_chip	chip;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 	struct mtd_info		mtd;
+#endif
 };
 
+static inline struct rb4xx_nand_info *mtd_to_rbinfo(struct mtd_info *mtd)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+	return container_of(mtd, struct rb4xx_nand_info, mtd);
+#else
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	return container_of(chip, struct rb4xx_nand_info, chip);
+#endif
+}
+
+static struct mtd_info *rbinfo_to_mtd(struct rb4xx_nand_info *nfc)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+	return &nfc->mtd;
+#else
+	return nand_to_mtd(&nfc->chip);
+#endif
+}
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 /*
  * We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader
@@ -191,6 +213,7 @@ static void rb4xx_nand_read_buf(struct mtd_info *mtd, unsigned char *buf,
 static int rb4xx_nand_probe(struct platform_device *pdev)
 {
 	struct rb4xx_nand_info	*info;
+	struct mtd_info *mtd;
 	int ret;
 
 	printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
@@ -259,8 +282,12 @@ static int rb4xx_nand_probe(struct platform_device *pdev)
 	}
 
 	info->chip.priv	= &info;
-	info->mtd.priv	= &info->chip;
-	info->mtd.owner	= THIS_MODULE;
+	mtd = rbinfo_to_mtd(info);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+	mtd->priv	= &info->chip;
+#endif
+	mtd->owner	= THIS_MODULE;
 
 	info->chip.cmd_ctrl	= rb4xx_nand_cmd_ctrl;
 	info->chip.dev_ready	= rb4xx_nand_dev_ready;
@@ -270,30 +297,33 @@ static int rb4xx_nand_probe(struct platform_device *pdev)
 
 	info->chip.chip_delay	= 25;
 	info->chip.ecc.mode	= NAND_ECC_SOFT;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
+	info->chip.ecc.algo = NAND_ECC_HAMMING;
+#endif
 	info->chip.options = NAND_NO_SUBPAGE_WRITE;
 
 	platform_set_drvdata(pdev, info);
 
-	ret = nand_scan_ident(&info->mtd, 1, NULL);
+	ret = nand_scan_ident(mtd, 1, NULL);
 	if (ret) {
 		ret = -ENXIO;
 		goto err_free_info;
 	}
 
-	if (info->mtd.writesize == 512)
+	if (mtd->writesize == 512)
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 		info->chip.ecc.layout = &rb4xx_nand_ecclayout;
 #else
-		mtd_set_ooblayout(&info->mtd, &rb4xx_nand_ecclayout_ops);
+		mtd_set_ooblayout(mtd, &rb4xx_nand_ecclayout_ops);
 #endif
 
-	ret = nand_scan_tail(&info->mtd);
+	ret = nand_scan_tail(mtd);
 	if (ret) {
 		return -ENXIO;
 		goto err_set_drvdata;
 	}
 
-	mtd_device_register(&info->mtd, rb4xx_nand_partitions,
+	mtd_device_register(mtd, rb4xx_nand_partitions,
 				ARRAY_SIZE(rb4xx_nand_partitions));
 	if (ret)
 		goto err_release_nand;
@@ -301,7 +331,7 @@ static int rb4xx_nand_probe(struct platform_device *pdev)
 	return 0;
 
 err_release_nand:
-	nand_release(&info->mtd);
+	nand_release(mtd);
 err_set_drvdata:
 	platform_set_drvdata(pdev, NULL);
 err_free_info:
@@ -322,7 +352,7 @@ static int rb4xx_nand_remove(struct platform_device *pdev)
 {
 	struct rb4xx_nand_info *info = platform_get_drvdata(pdev);
 
-	nand_release(&info->mtd);
+	nand_release(rbinfo_to_mtd(info));
 	platform_set_drvdata(pdev, NULL);
 	kfree(info);
 	gpio_free(RB4XX_NAND_GPIO_NCE);
diff --git a/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c b/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
index f8a6722cb..dbada68dd 100644
--- a/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
+++ b/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
@@ -41,13 +41,30 @@
 
 struct rb750_nand_info {
 	struct nand_chip	chip;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 	struct mtd_info		mtd;
+#endif
 	struct rb7xx_nand_platform_data *pdata;
 };
 
 static inline struct rb750_nand_info *mtd_to_rbinfo(struct mtd_info *mtd)
 {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 	return container_of(mtd, struct rb750_nand_info, mtd);
+#else
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	return container_of(chip, struct rb750_nand_info, chip);
+#endif
+}
+
+static struct mtd_info *rbinfo_to_mtd(struct rb750_nand_info *nfc)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+	return &nfc->mtd;
+#else
+	return nand_to_mtd(&nfc->chip);
+#endif
 }
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
@@ -304,6 +321,7 @@ static int rb750_nand_probe(struct platform_device *pdev)
 {
 	struct rb750_nand_info	*info;
 	struct rb7xx_nand_platform_data *pdata;
+	struct mtd_info *mtd;
 	int ret;
 
 	printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
@@ -317,8 +335,12 @@ static int rb750_nand_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	info->chip.priv	= &info;
-	info->mtd.priv	= &info->chip;
-	info->mtd.owner	= THIS_MODULE;
+
+	mtd = rbinfo_to_mtd(info);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+	mtd->priv	= &info->chip;
+#endif
+	mtd->owner	= THIS_MODULE;
 
 	info->chip.select_chip	= rb750_nand_select_chip;
 	info->chip.cmd_ctrl	= rb750_nand_cmd_ctrl;
@@ -329,6 +351,9 @@ static int rb750_nand_probe(struct platform_device *pdev)
 
 	info->chip.chip_delay	= 25;
 	info->chip.ecc.mode	= NAND_ECC_SOFT;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
+	info->chip.ecc.algo = NAND_ECC_HAMMING;
+#endif
 	info->chip.options = NAND_NO_SUBPAGE_WRITE;
 
 	info->pdata = pdata;
@@ -337,26 +362,26 @@ static int rb750_nand_probe(struct platform_device *pdev)
 
 	rb750_nand_gpio_init(info);
 
-	ret = nand_scan_ident(&info->mtd, 1, NULL);
+	ret = nand_scan_ident(mtd, 1, NULL);
 	if (ret) {
 		ret = -ENXIO;
 		goto err_free_info;
 	}
 
-	if (info->mtd.writesize == 512)
+	if (mtd->writesize == 512)
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 		info->chip.ecc.layout = &rb750_nand_ecclayout;
 #else
-		mtd_set_ooblayout(&info->mtd, &rb750_nand_ecclayout_ops);
+		mtd_set_ooblayout(mtd, &rb750_nand_ecclayout_ops);
 #endif
 
-	ret = nand_scan_tail(&info->mtd);
+	ret = nand_scan_tail(mtd);
 	if (ret) {
 		return -ENXIO;
 		goto err_set_drvdata;
 	}
 
-	ret = mtd_device_register(&info->mtd, rb750_nand_partitions,
+	ret = mtd_device_register(mtd, rb750_nand_partitions,
 				 ARRAY_SIZE(rb750_nand_partitions));
 	if (ret)
 		goto err_release_nand;
@@ -364,7 +389,7 @@ static int rb750_nand_probe(struct platform_device *pdev)
 	return 0;
 
 err_release_nand:
-	nand_release(&info->mtd);
+	nand_release(mtd);
 err_set_drvdata:
 	platform_set_drvdata(pdev, NULL);
 err_free_info:
@@ -376,7 +401,7 @@ static int rb750_nand_remove(struct platform_device *pdev)
 {
 	struct rb750_nand_info *info = platform_get_drvdata(pdev);
 
-	nand_release(&info->mtd);
+	nand_release(rbinfo_to_mtd(info));
 	platform_set_drvdata(pdev, NULL);
 	kfree(info);
 
diff --git a/target/linux/ar71xx/files/drivers/mtd/nand/rb91x_nand.c b/target/linux/ar71xx/files/drivers/mtd/nand/rb91x_nand.c
index 15b1816ae..c808f3998 100644
--- a/target/linux/ar71xx/files/drivers/mtd/nand/rb91x_nand.c
+++ b/target/linux/ar71xx/files/drivers/mtd/nand/rb91x_nand.c
@@ -40,7 +40,9 @@
 
 struct rb91x_nand_info {
 	struct nand_chip chip;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 	struct mtd_info mtd;
+#endif
 	struct device *dev;
 
 	int gpio_nce;
@@ -54,9 +56,25 @@ struct rb91x_nand_info {
 
 static inline struct rb91x_nand_info *mtd_to_rbinfo(struct mtd_info *mtd)
 {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 	return container_of(mtd, struct rb91x_nand_info, mtd);
+#else
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	return container_of(chip, struct rb91x_nand_info, chip);
+#endif
 }
 
+static struct mtd_info *rbinfo_to_mtd(struct rb91x_nand_info *nfc)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+	return &nfc->mtd;
+#else
+	return nand_to_mtd(&nfc->chip);
+#endif
+}
+
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 /*
  * We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader
@@ -340,6 +358,7 @@ static int rb91x_nand_probe(struct platform_device *pdev)
 {
 	struct rb91x_nand_info	*rbni;
 	struct rb91x_nand_platform_data *pdata;
+	struct mtd_info *mtd;
 	int ret;
 
 	pr_info(DRV_DESC "\n");
@@ -362,8 +381,12 @@ static int rb91x_nand_probe(struct platform_device *pdev)
 	rbni->gpio_nle = pdata->gpio_nle;
 
 	rbni->chip.priv	= &rbni;
-	rbni->mtd.priv	= &rbni->chip;
-	rbni->mtd.owner	= THIS_MODULE;
+	mtd = rbinfo_to_mtd(rbni);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+	mtd->priv	= &rbni->chip;
+#endif
+	mtd->owner	= THIS_MODULE;
 
 	rbni->chip.cmd_ctrl	= rb91x_nand_cmd_ctrl;
 	rbni->chip.dev_ready	= rb91x_nand_dev_ready;
@@ -373,6 +396,9 @@ static int rb91x_nand_probe(struct platform_device *pdev)
 
 	rbni->chip.chip_delay	= 25;
 	rbni->chip.ecc.mode	= NAND_ECC_SOFT;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
+	rbni->chip.ecc.algo = NAND_ECC_HAMMING;
+#endif
 	rbni->chip.options = NAND_NO_SUBPAGE_WRITE;
 
 	platform_set_drvdata(pdev, rbni);
@@ -381,22 +407,22 @@ static int rb91x_nand_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = nand_scan_ident(&rbni->mtd, 1, NULL);
+	ret = nand_scan_ident(mtd, 1, NULL);
 	if (ret)
 		return ret;
 
-	if (rbni->mtd.writesize == 512)
+	if (mtd->writesize == 512)
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 		rbni->chip.ecc.layout = &rb91x_nand_ecclayout;
 #else
-		mtd_set_ooblayout(&rbni->mtd, &rb91x_nand_ecclayout_ops);
+		mtd_set_ooblayout(mtd, &rb91x_nand_ecclayout_ops);
 #endif
 
-	ret = nand_scan_tail(&rbni->mtd);
+	ret = nand_scan_tail(mtd);
 	if (ret)
 		return ret;
 
-	ret = mtd_device_register(&rbni->mtd, rb91x_nand_partitions,
+	ret = mtd_device_register(mtd, rb91x_nand_partitions,
 				 ARRAY_SIZE(rb91x_nand_partitions));
 	if (ret)
 		goto err_release_nand;
@@ -404,7 +430,7 @@ static int rb91x_nand_probe(struct platform_device *pdev)
 	return 0;
 
 err_release_nand:
-	nand_release(&rbni->mtd);
+	nand_release(mtd);
 	return ret;
 }
 
@@ -412,7 +438,7 @@ static int rb91x_nand_remove(struct platform_device *pdev)
 {
 	struct rb91x_nand_info *info = platform_get_drvdata(pdev);
 
-	nand_release(&info->mtd);
+	nand_release(rbinfo_to_mtd(info));
 
 	return 0;
 }
diff --git a/target/linux/ar71xx/image/generic.mk b/target/linux/ar71xx/image/generic.mk
index 6f5a7016e..3c5fcc3f3 100644
--- a/target/linux/ar71xx/image/generic.mk
+++ b/target/linux/ar71xx/image/generic.mk
@@ -358,7 +358,6 @@ define Device/dr344
   MTDPARTS := spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,6336k(rootfs),1408k(kernel),64k(nvram),64k(art)ro,7744k@0x50000(firmware)
   IMAGE/sysupgrade.bin := append-rootfs | pad-rootfs | pad-to $$$$(ROOTFS_SIZE) | append-kernel | check-size $$$$(IMAGE_SIZE)
 endef
-TARGET_DEVICES += dr344
 
 define Device/dr531
   DEVICE_TITLE := Wallys DR531
diff --git a/target/linux/ar71xx/image/lzma-loader/src/Makefile b/target/linux/ar71xx/image/lzma-loader/src/Makefile
index 5f10bdb8f..682b31fe8 100644
--- a/target/linux/ar71xx/image/lzma-loader/src/Makefile
+++ b/target/linux/ar71xx/image/lzma-loader/src/Makefile
@@ -37,11 +37,13 @@ CFLAGS		= -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
 		  -mabi=32 -march=mips32r2 \
 		  -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
 CFLAGS		+= -D_LZMA_PROB32
+CFLAGS		+= -flto
 
 ASFLAGS		= $(CFLAGS) -D__ASSEMBLY__
 
-LDFLAGS		= -static --gc-sections -no-warn-mismatch
-LDFLAGS		+= -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
+LDFLAGS		= -static -Wl,--gc-sections -Wl,-no-warn-mismatch
+LDFLAGS		+= -Wl,-e,startup -T loader.lds -Wl,-Ttext,$(LZMA_TEXT_START)
+LDFLAGS		+= -flto -fwhole-program
 
 O_FORMAT 	= $(shell $(OBJDUMP) -i | head -2 | grep elf32)
 
@@ -86,7 +88,7 @@ data.o: $(LOADER_DATA)
 	$(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
 
 loader: $(OBJECTS)
-	$(LD) $(LDFLAGS) -o $@ $(OBJECTS)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS)
 
 loader.bin: loader
 	$(OBJCOPY) $(BIN_FLAGS) $< $@
diff --git a/target/linux/ar71xx/image/lzma-loader/src/head.S b/target/linux/ar71xx/image/lzma-loader/src/head.S
index 47a7c9bd6..d414b14d1 100644
--- a/target/linux/ar71xx/image/lzma-loader/src/head.S
+++ b/target/linux/ar71xx/image/lzma-loader/src/head.S
@@ -42,6 +42,19 @@ LEAF(startup)
 	mtc0	t0, CP0_STATUS
 	ehb
 
+	/*
+	 * Some bootloaders set the 'Kseg0 coherency algorithm' to
+	 * 'Cacheable, noncoherent, write-through, no write allocate'
+	 * and this cause performance issues. Let's go and change it to
+	 * 'Cacheable, noncoherent, write-back, write allocate'
+	 */
+	mfc0	t0, CP0_CONFIG
+	li	t1, ~7			#~CONF_CM_CMASK
+	and	t0, t1
+	ori	t0, 3			#CONF_CM_CACHABLE_NONCOHERENT
+	mtc0	t0, CP0_CONFIG
+	nop
+
 	mtc0	zero, CP0_COUNT
 	mtc0	zero, CP0_COMPARE
 	ehb
diff --git a/target/linux/ar71xx/image/tp-link.mk b/target/linux/ar71xx/image/tp-link.mk
index 4e81251d0..6d5b0fe8d 100644
--- a/target/linux/ar71xx/image/tp-link.mk
+++ b/target/linux/ar71xx/image/tp-link.mk
@@ -150,7 +150,7 @@ define Device/archer-c60-v1
   MTDPARTS := spi0.0:64k(u-boot)ro,64k(mac)ro,1344k(kernel),6592k(rootfs),64k(tplink)ro,64k(art)ro,7936k@0x20000(firmware)
   SUPPORTED_DEVICES := archer-c60-v1
 endef
-TARGET_DEVICES += archer-c25-v1 archer-c58-v1 archer-c59-v1 archer-c60-v1
+TARGET_DEVICES += archer-c25-v1 archer-c59-v1
 
 define Device/archer-c5-v1
   $(Device/tplink-16mlzma)
@@ -1043,7 +1043,6 @@ define Device/tl-wr902ac-v1
 	append-metadata | check-size $$$$(IMAGE_SIZE)
   MTDPARTS := spi0.0:128k(u-boot)ro,7360k(firmware),640k(tplink)ro,64k(art)ro
 endef
-TARGET_DEVICES += tl-wr902ac-v1
 
 define Device/tl-wr940n-v4
   $(Device/tplink-8mlzma)
@@ -1118,4 +1117,4 @@ define Device/tl-wr942n-v1
   MTDPARTS := spi0.0:128k(u-boot)ro,1344k(kernel),13120k(rootfs),64k(product-info)ro,64k(partition-table)ro,256k(oem-config)ro,1344k(oem-vars)ro,64k(ART)ro,14464k@0x20000(firmware)
   SUPPORTED_DEVICES := tl-wr942n-v1
 endef
-TARGET_DEVICES += tl-wr940n-v4 tl-wr941nd-v2 tl-wr941nd-v3 tl-wr941nd-v4 tl-wr941nd-v5 tl-wr941nd-v6 tl-wr941nd-v6-cn tl-wr942n-v1
+TARGET_DEVICES += tl-wr940n-v4 tl-wr941nd-v2 tl-wr941nd-v3 tl-wr941nd-v4 tl-wr941nd-v5 tl-wr941nd-v6 tl-wr941nd-v6-cn
diff --git a/target/linux/ar71xx/image/ubnt.mk b/target/linux/ar71xx/image/ubnt.mk
index f80f2f1b3..dfc795bb2 100644
--- a/target/linux/ar71xx/image/ubnt.mk
+++ b/target/linux/ar71xx/image/ubnt.mk
@@ -256,4 +256,3 @@ define Device/ubnt-unifi-outdoor-plus
   BOARDNAME := UBNT-UOP
   DEVICE_PROFILE := UBNT
 endef
-TARGET_DEVICES += ubnt-uap-pro ubnt-unifi-outdoor-plus
diff --git a/target/linux/ar71xx/mikrotik/config-default b/target/linux/ar71xx/mikrotik/config-default
index e333166e9..42f9882bb 100644
--- a/target/linux/ar71xx/mikrotik/config-default
+++ b/target/linux/ar71xx/mikrotik/config-default
@@ -231,6 +231,7 @@ CONFIG_MTD_NAND_RB4XX=y
 CONFIG_MTD_NAND_RB750=y
 CONFIG_MTD_NAND_RB91X=y
 # CONFIG_MTD_REDBOOT_PARTS is not set
+CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
 # CONFIG_MTD_SPLIT_EVA_FW is not set
 # CONFIG_MTD_SPLIT_TPLINK_FW is not set
 # CONFIG_MTD_TPLINK_PARTS is not set