unbreak rpi kernel support, HIGHMEM seems unusable

target/arm/bcm28xx/patches/4.4.10/0001-raspberry-pi-github.patch

@@ -7701,7 +7701,7 @@ diff -Nur linux-4.4.8/arch/arm/configs/bcm2709_defconfig linux-rpi/arch/arm/conf
 @@ -0,0 +1,1275 @@
 +# CONFIG_ARM_PATCH_PHYS_VIRT is not set
 +CONFIG_PHYS_OFFSET=0
-+CONFIG_LOCALVERSION="-v7"
++# CONFIG_LOCALVERSION is not set
 +# CONFIG_LOCALVERSION_AUTO is not set
 +CONFIG_SYSVIPC=y
 +CONFIG_POSIX_MQUEUE=y

target/arm/kernel/raspberry-pi3

@@ -14,5 +14,4 @@ CONFIG_BCM2708_VCHIQ=y
 CONFIG_BCM2708_VCMEM=y
 CONFIG_MAILBOX=y
 CONFIG_BCM2835_MBOX=y
-CONFIG_OF=y
 CONFIG_CMDLINE_FROM_BOOTLOADER=y

target/linux/config/Config.in.dma

@@ -51,12 +51,12 @@ config ADK_KERNEL_BCM_VC_CMA
 config ADK_KERNEL_BCM_VCIO
 	bool
 
-config ADK_KERNEL_DMA_BCM2708_LEGACY
+config ADK_KERNEL_DMA_BCM2835
 	bool
 
 config ADK_KERNEL_DMA_BCM2708
         bool
-	select ADK_KERNEL_DMA_BCM2708_LEGACY
+	select ADK_KERNEL_DMA_BCM2835
         select ADK_KERNEL_DMADEVICES
 	select ADK_KERNEL_DMA_SHARED_BUFFER
 	select ADK_KERNEL_CMA

target/linux/config/Config.in.graphics

@@ -243,8 +243,6 @@ config ADK_KERNEL_FB_SM7XX
 
 config ADK_KERNEL_FB_BCM2708
 	bool "Framebuffer support for BCM28XX boards"
-	select ADK_KERNEL_DRM if ADK_TARGET_KERNEL_VERSION_4_4
-	select ADK_KERNEL_DRM_VC4 if ADK_TARGET_KERNEL_VERSION_4_4
 	select ADK_KERNEL_FB
 	select ADK_KERNEL_FRAMEBUFFER_CONSOLE
 	select ADK_KERNEL_FONT_8x16

target/linux/config/Config.in.i2c

@@ -17,7 +17,7 @@ config ADK_KERNEL_I2C_BCM2708
 	select ADK_KERNEL_REGMAP_I2C
 	select ADK_KERNEL_I2C_CHARDEV
 	depends on ADK_TARGET_BOARD_BCM28XX
-	default y if ADK_TARGET_BOARD_BCM28XX
+	default m if ADK_TARGET_BOARD_BCM28XX
 	default n
 	help
 	  I2C driver for BCM28XX boards.

target/linux/config/Config.in.kernel

@@ -195,9 +195,9 @@ config ADK_KERNEL_SMP
 
 config ADK_KERNEL_HIGHMEM
 	bool "Enable high memory"
+	# produces broken kernel on bcm28xx
+	depends on !ADK_TARGET_BOARD_BCM28XX
 	default y if ADK_TARGET_SYSTEM_IBM_X40
-	default y if ADK_TARGET_SYSTEM_RASPBERRY_PI2
-	default y if ADK_TARGET_SYSTEM_RASPBERRY_PI3
 	default y if ADK_TARGET_MODEL_CUBOX_I4PRO
 	default y if ADK_TARGET_MODEL_CUBOX_I2ULTRA
 	default y if ADK_TARGET_MODEL_CUBOX_I2EX

target/linux/config/Config.in.spi

@@ -34,7 +34,7 @@ config ADK_KERNEL_SPI_BCM2835
 	select ADK_KERNEL_REGMAP
 	select ADK_KERNEL_REGMAP_SPI
 	depends on ADK_TARGET_BOARD_BCM28XX
-	default y if ADK_TARGET_BOARD_BCM28XX
+	default m if ADK_TARGET_BOARD_BCM28XX
 	default n
 
 config ADK_KERNEL_SPI_IMX