rb532: convert to new loopback based overlay support

Disable block2mtd support

Signed-off-by: Felix Fietkau <nbd@nbd.name>

target/linux/rb532/Makefile

@@ -14,6 +14,7 @@ FEATURES:=pci targz squashfs
 KERNEL_PATCHVER:=4.4
 
 include $(INCLUDE_DIR)/target.mk
-DEFAULT_PACKAGES += wpad-mini kmod-ath5k kmod-input-rb532
+
+DEFAULT_PACKAGES += wpad-mini kmod-ath5k kmod-input-rb532 e2fsprogs mkf2fs
 
 $(eval $(call BuildTarget))

target/linux/rb532/config-4.4

@@ -1,12 +1,20 @@
-CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE=y
+CONFIG_ARCH_BINFMT_ELF_STATE=y
+CONFIG_ARCH_CLOCKSOURCE_DATA=y
 CONFIG_ARCH_DISCARD_MEMBLOCK=y
 CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y
-CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y
+CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
+# CONFIG_ARCH_HAS_GCOV_PROFILE_ALL is not set
+# CONFIG_ARCH_HAS_SG_CHAIN is not set
 CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
+CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
 CONFIG_ARCH_REQUIRE_GPIOLIB=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ARCH_USE_BUILTIN_BSWAP=y
 CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
 CONFIG_ATA=y
+CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_CEVT_R4K=y
@@ -18,6 +26,7 @@ CONFIG_CPU_LITTLE_ENDIAN=y
 CONFIG_CPU_MIPS32=y
 CONFIG_CPU_MIPS32_R1=y
 CONFIG_CPU_MIPSR1=y
+CONFIG_CPU_NEEDS_NO_SMARTMIPS_OR_MICROMIPS=y
 CONFIG_CPU_R4K_CACHE_TLB=y
 CONFIG_CPU_R4K_FPU=y
 CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
@@ -26,48 +35,68 @@ CONFIG_CRC16=y
 CONFIG_CRYPTO_CRC32C=y
 CONFIG_CRYPTO_HASH=y
 CONFIG_CRYPTO_HASH2=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_WORKQUEUE=y
 CONFIG_CSRC_R4K=y
 CONFIG_DMA_NONCOHERENT=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
 CONFIG_EXT4_FS=y
+# CONFIG_F2FS_CHECK_FS is not set
+CONFIG_F2FS_FS=y
+# CONFIG_F2FS_FS_SECURITY is not set
+CONFIG_F2FS_FS_XATTR=y
+CONFIG_F2FS_STAT_FS=y
 CONFIG_FS_MBCACHE=y
 CONFIG_GENERIC_ATOMIC64=y
 CONFIG_GENERIC_CLOCKEVENTS=y
-CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
 CONFIG_GENERIC_CMOS_UPDATE=y
 CONFIG_GENERIC_IO=y
+CONFIG_GENERIC_IRQ_CHIP=y
 CONFIG_GENERIC_IRQ_SHOW=y
 CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_SCHED_CLOCK=y
 CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_TIME_VSYSCALL=y
+CONFIG_GLOB=y
 CONFIG_GPIOLIB=y
 CONFIG_GPIO_DEVRES=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_HARDWARE_WATCHPOINTS=y
 CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y
-CONFIG_HAS_IOPORT=y
+CONFIG_HAS_IOPORT_MAP=y
 # CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
+# CONFIG_HAVE_ARCH_BITREVERSE is not set
 CONFIG_HAVE_ARCH_JUMP_LABEL=y
 CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
 # CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_HAVE_BPF_JIT=y
+CONFIG_HAVE_CC_STACKPROTECTOR=y
+CONFIG_HAVE_CONTEXT_TRACKING=y
 CONFIG_HAVE_C_RECORDMCOUNT=y
 CONFIG_HAVE_DEBUG_KMEMLEAK=y
+CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
 CONFIG_HAVE_DMA_API_DEBUG=y
 CONFIG_HAVE_DMA_ATTRS=y
+CONFIG_HAVE_DMA_CONTIGUOUS=y
 CONFIG_HAVE_DYNAMIC_FTRACE=y
 CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
 CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
 CONFIG_HAVE_FUNCTION_TRACER=y
-CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
 CONFIG_HAVE_GENERIC_DMA_COHERENT=y
-CONFIG_HAVE_GENERIC_HARDIRQS=y
 CONFIG_HAVE_IDE=y
+CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
+CONFIG_HAVE_LATENCYTOP_SUPPORT=y
 CONFIG_HAVE_MEMBLOCK=y
 CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
 CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_HAVE_NET_DSA=y
 CONFIG_HAVE_OPROFILE=y
 CONFIG_HAVE_PERF_EVENTS=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
 # CONFIG_HIGH_RES_TIMERS is not set
 CONFIG_HW_HAS_PCI=y
 CONFIG_HW_RANDOM=y
@@ -77,21 +106,24 @@ CONFIG_HZ_250=y
 CONFIG_HZ_PERIODIC=y
 CONFIG_IMAGE_CMDLINE_HACK=y
 CONFIG_INITRAMFS_SOURCE=""
-CONFIG_IRQ_CPU=y
+CONFIG_IRQ_DOMAIN=y
 CONFIG_IRQ_FORCED_THREADING=y
+CONFIG_IRQ_MIPS_CPU=y
 CONFIG_IRQ_WORK=y
 CONFIG_JBD2=y
 CONFIG_KEXEC=y
+CONFIG_KEXEC_CORE=y
 CONFIG_KORINA=y
 CONFIG_LEDS_MIKROTIK_RB532=y
 CONFIG_MIKROTIK_RB532=y
 CONFIG_MIPS=y
+CONFIG_MIPS_CLOCK_VSYSCALL=y
+CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER=y
 # CONFIG_MIPS_HUGE_TLB_SUPPORT is not set
 CONFIG_MIPS_L1_CACHE_SHIFT=4
+CONFIG_MIPS_L1_CACHE_SHIFT_4=y
 # CONFIG_MIPS_MACHINE is not set
-CONFIG_MIPS_MT_DISABLED=y
 CONFIG_MODULES_USE_ELF_REL=y
-CONFIG_MTD_BLOCK2MTD=y
 CONFIG_MTD_CFI_ADV_OPTIONS=y
 # CONFIG_MTD_CFI_AMDSTD is not set
 CONFIG_MTD_CFI_GEOMETRY=y
@@ -102,35 +134,34 @@ CONFIG_MTD_NAND_ECC=y
 CONFIG_MTD_NAND_PLATFORM=y
 CONFIG_MTD_PHYSMAP=y
 # CONFIG_MTD_ROOTFS_ROOT_DEV is not set
-CONFIG_MTD_ROOTFS_SPLIT=y
-# CONFIG_MTD_SM_COMMON is not set
-# CONFIG_MTD_SPLIT is not set
 CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NEED_PER_CPU_KM=y
 CONFIG_NO_GENERIC_PCI_IOPORT_MAP=y
+# CONFIG_NO_IOPORT_MAP is not set
 # CONFIG_OF is not set
-CONFIG_PAGEFLAGS_EXTENDED=y
 CONFIG_PATA_RB532=y
 CONFIG_PCI=y
 CONFIG_PCI_DISABLE_COMMON_QUIRKS=y
 CONFIG_PCI_DOMAINS=y
 CONFIG_PERF_USE_VMALLOC=y
-# CONFIG_PREEMPT_RCU is not set
+CONFIG_PGTABLE_LEVELS=2
 CONFIG_RC32434_WDT=y
 # CONFIG_RCU_STALL_COMMON is not set
+# CONFIG_SCHED_HRTICK is not set
+# CONFIG_SCHED_INFO is not set
 CONFIG_SCSI=y
 # CONFIG_SCSI_LOWLEVEL is not set
-# CONFIG_SCSI_MULTI_LUN is not set
 # CONFIG_SCSI_PROC_FS is not set
+# CONFIG_SERIAL_8250_FSL is not set
+CONFIG_SRCU=y
 # CONFIG_SWAP is not set
 CONFIG_SWAP_IO_SPACE=y
+CONFIG_SYSCTL_EXCEPTION_TRACE=y
 CONFIG_SYS_HAS_CPU_MIPS32_R1=y
 CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
 CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
 CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
 CONFIG_TICK_CPU_ACCOUNTING=y
-CONFIG_UIDGID_CONVERTED=y
-CONFIG_USB_ARCH_HAS_XHCI=y
 CONFIG_VIA_RHINE=y
 CONFIG_VIA_RHINE_MMIO=y
 CONFIG_YAFFS_9BYTE_TAGS=y

target/linux/rb532/image/Makefile

@@ -43,34 +43,18 @@ ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 endif
 endef
 
-define Image/cmdline/jffs2-64k
-block2mtd.block2mtd=/dev/sda2,65536 root=/dev/mtdblock2 rootfstype=jffs2
-endef
-
-define Image/cmdline/jffs2-128k
-block2mtd.block2mtd=/dev/sda2,131072 root=/dev/mtdblock2 rootfstype=jffs2
-endef
-
-define Image/cmdline/ext4
-root=/dev/sda2 rootfstype=ext4
-endef
-
-define Image/cmdline/squashfs
-block2mtd.block2mtd=/dev/sda2,65536,rootfs root=/dev/mtdblock2 rootfstype=squashfs
-endef
-
 define Image/cmdline/yaffs2
 root=/dev/mtdblock1 rootfstype=yaffs2
 endef
 
 define Image/Build/squashfs
-	$(call prepare_generic_squashfs,$(KDIR)/root.squashfs)
+	dd if=/dev/zero bs=128k count=1 >> $(KDIR)/root.squashfs
 endef
 
 define Image/Build
 	$(call Image/Build/$(1),$(1))
 	$(CP) $(KDIR)/vmlinux.elf $(BIN_DIR)/$(IMG_PREFIX)-$(1).kernel
-	$(STAGING_DIR_HOST)/bin/patch-cmdline $(BIN_DIR)/$(IMG_PREFIX)-$(1).kernel '$(strip $(call Image/cmdline/$(1))) '
+	$(STAGING_DIR_HOST)/bin/patch-cmdline $(BIN_DIR)/$(IMG_PREFIX)-$(1).kernel 'root=/dev/sda2 '
 	./gen_image.sh $(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).bin \
 		5 $(BIN_DIR)/$(IMG_PREFIX)-$(1).kernel \
 		$(CONFIG_TARGET_ROOTFS_PARTSIZE) $(KDIR)/root.$(1) \