The dmesg output of my initial compiled 4.14 version as follow:
root@OpenWrt:~# dmesg
[ 0.000000] Linux version 4.14.169 (enig123@mydebian) (gcc version 8.3.0 (OpenWrt GCC 8.3.0 r12250-e84079578a)) #0 SMP Tue Feb 18 15:05:59 2020
[ 0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 0001992f (MIPS 1004Kc)
[ 0.000000] MIPS: machine is D-Link DIR-860L B1
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 08000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] VPE topology {2,2} total 4
[ 0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 0.000000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x0000000007ffffff]
[ 0.000000] HighMem empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000007ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000007ffffff]
[ 0.000000] On node 0 totalpages: 32768
[ 0.000000] free_area_init_node: node 0, pgdat 805f0400, node_mem_map 81003000
[ 0.000000] Normal zone: 288 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 32768 pages, LIFO batch:7
[ 0.000000] random: get_random_bytes called from start_kernel+0x9c/0x4d8 with crng_init=0
[ 0.000000] percpu: Embedded 14 pages/cpu s26064 r8192 d23088 u57344
[ 0.000000] pcpu-alloc: s26064 r8192 d23088 u57344 alloc=14*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 32480
[ 0.000000] Kernel command line: console=ttyS0,57600 rootfstype=squashfs,jffs2
[ 0.000000] PID hash table entries: 512 (order: -1, 2048 bytes)
[ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Writing ErrCtl register=00010410
[ 0.000000] Readback ErrCtl register=00010410
[ 0.000000] Memory: 121872K/131072K available (4788K kernel code, 247K rwdata, 1044K rodata, 1268K init, 253K bss, 9200K reserved, 0K cma-reserved, 0K highmem)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] NR_IRQS: 256
[ 0.000000] CPU Clock: 880MHz
[ 0.000000] clocksource: GIC: mask: 0xffffffffffffffff max_cycles: 0xcaf478abb4, max_idle_ns: 440795247997 ns
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 4343773742 ns
[ 0.000009] sched_clock: 32 bits at 440MHz, resolution 2ns, wraps every 4880645118ns
[ 0.015491] Calibrating delay loop... 586.13 BogoMIPS (lpj=2930688)
[ 0.087822] pid_max: default: 32768 minimum: 301
[ 0.097179] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.110202] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.126268] Hierarchical SRCU implementation.
[ 0.135779] smp: Bringing up secondary CPUs ...
[ 8.388826] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 8.388835] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 8.388846] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 8.388979] CPU1 revision is: 0001992f (MIPS 1004Kc)
[ 0.205112] Synchronize counters for CPU 1: done.
[ 8.517055] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 8.517064] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 8.517072] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 8.517144] CPU2 revision is: 0001992f (MIPS 1004Kc)
[ 0.325946] Synchronize counters for CPU 2: done.
[ 8.629580] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 8.629587] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 8.629593] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 8.629684] CPU3 revision is: 0001992f (MIPS 1004Kc)
[ 0.445511] Synchronize counters for CPU 3: done.
[ 0.505118] smp: Brought up 1 node, 4 CPUs
[ 0.517501] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.536957] futex hash table entries: 1024 (order: 3, 32768 bytes)
[ 0.549480] pinctrl core: initialized pinctrl subsystem
[ 0.560620] NET: Registered protocol family 16
[ 0.576860] FPU Affinity set after 11720 emulations
[ 0.580174] pull PCIe RST: RALINK_RSTCTRL = 0
[ 0.889147] release PCIe RST: RALINK_RSTCTRL = 7000000
[ 0.899215] ***** Xtal 40MHz *****
[ 0.905941] release PCIe RST: RALINK_RSTCTRL = 7000000
[ 0.916149] Port 0 N_FTS = 1b105000
[ 0.923049] Port 1 N_FTS = 1b105000
[ 0.929977] Port 2 N_FTS = 1b102800
[ 2.088746] PCIE2 no card, disable it(RST&CLK)
[ 2.097439] -> 21007f2
[ 2.102255] PCIE0 enabled
[ 2.107455] PCIE1 enabled
[ 2.112636] PCI host bridge /pcie@1e140000 ranges:
[ 2.122160] MEM 0x0000000060000000..0x000000006fffffff
[ 2.132517] IO 0x000000001e160000..0x000000001e16ffff
[ 2.142891] PCI coherence region base: 0xbfbf8000, mask/settings: 0x60000000
[ 2.166641] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 2.177877] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 2.189051] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 2.201440] PCI host bridge to bus 0000:00
[ 2.209458] pci_bus 0000:00: root bus resource [mem 0x60000000-0x6fffffff]
[ 2.223119] pci_bus 0000:00: root bus resource [io 0xffffffff]
[ 2.234861] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[ 2.248343] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[ 2.264104] pci 0000:00:00.0: [0e8d:0801] type 01 class 0x060400
[ 2.264142] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x7fffffff]
[ 2.264154] pci 0000:00:00.0: reg 0x14: [mem 0x60400000-0x6040ffff]
[ 2.264218] pci 0000:00:00.0: supports D1
[ 2.264227] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[ 2.264475] pci 0000:00:01.0: [0e8d:0801] type 01 class 0x060400
[ 2.264504] pci 0000:00:01.0: reg 0x10: [mem 0x00000000-0x7fffffff]
[ 2.264518] pci 0000:00:01.0: reg 0x14: [mem 0x60410000-0x6041ffff]
[ 2.264572] pci 0000:00:01.0: supports D1
[ 2.264581] pci 0000:00:01.0: PME# supported from D0 D1 D3hot
[ 2.264990] pci 0000:01:00.0: [14c3:7662] type 00 class 0x028000
[ 2.265046] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x000fffff 64bit]
[ 2.265091] pci 0000:01:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[ 2.265185] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold
[ 2.265362] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
[ 2.265550] pci 0000:02:00.0: [14c3:7662] type 00 class 0x028000
[ 2.265603] pci 0000:02:00.0: reg 0x10: [mem 0x00000000-0x000fffff 64bit]
[ 2.265649] pci 0000:02:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[ 2.265740] pci 0000:02:00.0: PME# supported from D0 D3hot D3cold
[ 2.265911] pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 02
[ 2.265929] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 02
[ 2.265986] pci 0000:00:00.0: BAR 0: no space for [mem size 0x80000000]
[ 2.279015] pci 0000:00:00.0: BAR 0: failed to assign [mem size 0x80000000]
[ 2.292833] pci 0000:00:01.0: BAR 0: no space for [mem size 0x80000000]
[ 2.305955] pci 0000:00:01.0: BAR 0: failed to assign [mem size 0x80000000]
[ 2.319786] pci 0000:00:00.0: BAR 8: assigned [mem 0x60000000-0x600fffff]
[ 2.333268] pci 0000:00:00.0: BAR 9: assigned [mem 0x60100000-0x601fffff pref]
[ 2.347604] pci 0000:00:01.0: BAR 8: assigned [mem 0x60200000-0x602fffff]
[ 2.361090] pci 0000:00:01.0: BAR 9: assigned [mem 0x60300000-0x603fffff pref]
[ 2.375430] pci 0000:00:00.0: BAR 1: assigned [mem 0x60400000-0x6040ffff]
[ 2.388909] pci 0000:00:01.0: BAR 1: assigned [mem 0x60410000-0x6041ffff]
[ 2.402395] pci 0000:01:00.0: BAR 0: assigned [mem 0x60000000-0x600fffff 64bit]
[ 2.416913] pci 0000:01:00.0: BAR 6: assigned [mem 0x60100000-0x6010ffff pref]
[ 2.431244] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 2.441079] pci 0000:00:00.0: bridge window [mem 0x60000000-0x600fffff]
[ 2.454571] pci 0000:00:00.0: bridge window [mem 0x60100000-0x601fffff pref]
[ 2.468916] pci 0000:02:00.0: BAR 0: assigned [mem 0x60200000-0x602fffff 64bit]
[ 2.483438] pci 0000:02:00.0: BAR 6: assigned [mem 0x60300000-0x6030ffff pref]
[ 2.497774] pci 0000:00:01.0: PCI bridge to [bus 02]
[ 2.507604] pci 0000:00:01.0: bridge window [mem 0x60200000-0x602fffff]
[ 2.521098] pci 0000:00:01.0: bridge window [mem 0x60300000-0x603fffff pref]
[ 2.536811] clocksource: Switched to clocksource GIC
[ 2.548178] NET: Registered protocol family 2
[ 2.557498] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 2.571235] TCP bind hash table entries: 1024 (order: 1, 8192 bytes)
[ 2.583836] TCP: Hash tables configured (established 1024 bind 1024)
[ 2.596572] UDP hash table entries: 256 (order: 1, 8192 bytes)
[ 2.608070] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[ 2.620723] NET: Registered protocol family 1
[ 2.629307] PCI: CLS 0 bytes, default 32
[ 2.866744] 4 CPUs re-calibrate udelay(lpj = 2924544)
[ 2.878153] Crashlog allocated RAM at address 0x3f00000
[ 2.888673] workingset: timestamp_bits=14 max_order=15 bucket_order=1
[ 2.909473] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 2.921007] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 2.944017] io scheduler noop registered
[ 2.951761] io scheduler deadline registered (default)
[ 2.962852] Serial: 8250/16550 driver, 3 ports, IRQ sharing disabled
[ 2.976989] console [ttyS0] disabled
[ 2.984003] 1e000c00.uartlite: ttyS0 at MMIO 0x1e000c00 (irq = 19, base_baud = 3125000) is a 16550A
[ 3.001988] console [ttyS0] enabled
[ 3.015770] bootconsole [early0] disabled
[ 3.033083] random: fast init done
[ 3.040645] MediaTek Nand driver init, version v2.1 Fix AHB virt2phys error
[ 3.054956] spi-mt7621 1e000b00.spi: sys_freq: 220000000
[ 3.066478] m25p80 spi0.0: mx25l12805d (16384 Kbytes)
[ 3.076622] 6 fixed-partitions partitions found on MTD device spi0.0
[ 3.089277] Creating 6 MTD partitions on "spi0.0":
[ 3.098822] 0x000000000000-0x000000030000 : "u-boot"
[ 3.109886] 0x000000030000-0x000000034000 : "u-boot-env"
[ 3.121594] 0x000000034000-0x000000038000 : "radio"
[ 3.132440] 0x000000038000-0x000000040000 : "factory"
[ 3.143672] 0x000000040000-0x000000050000 : "defaults"
[ 3.155040] 0x000000050000-0x000001000000 : "firmware"
[ 3.167132] 2 seama-fw partitions found on MTD device firmware
[ 3.178759] Creating 2 MTD partitions on "firmware":
[ 3.188662] 0x000000000040-0x0000001f0000 : "kernel"
[ 3.199570] 0x0000001f0000-0x000000fb0000 : "rootfs"
[ 3.210338] mtd: device 7 (rootfs) set to be root filesystem
[ 3.221771] 1 squashfs-split partitions found on MTD device rootfs
[ 3.234086] Creating 1 MTD partitions on "rootfs":
[ 3.243636] 0x0000004e0000-0x000000dc0000 : "rootfs_data"
[ 3.256029] libphy: Fixed MDIO Bus: probed
[ 3.328589] mtk_soc_eth 1e100000.ethernet: generated random MAC address d6:13:11:b7:d4:7d
[ 3.345045] libphy: mdio: probed
[ 4.752396] mtk_soc_eth 1e100000.ethernet: loaded mt7530 driver
[ 4.764926] mtk_soc_eth 1e100000.ethernet eth0: mediatek frame engine at 0xbe100000, irq 21
[ 4.784312] NET: Registered protocol family 10
[ 4.794772] Segment Routing with IPv6
[ 4.802227] NET: Registered protocol family 17
[ 4.811162] 8021q: 802.1Q VLAN Support v1.8
[ 4.821877] hctosys: unable to open rtc device (rtc0)
[ 4.837771] VFS: Mounted root (squashfs filesystem) readonly on device 31:7.
[ 4.856006] Freeing unused kernel memory: 1268K
[ 4.865080] This architecture does not have kernel memory protection.
[ 5.765791] init: Console is alive
[ 5.772911] init: - watchdog -
[ 6.201047] mtk_soc_eth 1e100000.ethernet eth0: port 1 link up
[ 6.845360] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 7.004391] usbcore: registered new interface driver usbfs
[ 7.015451] usbcore: registered new interface driver hub
[ 7.026205] usbcore: registered new device driver usb
[ 7.044407] xhci-mtk 1e1c0000.xhci: 1e1c0000.xhci supply vbus not found, using dummy regulator
[ 7.061704] xhci-mtk 1e1c0000.xhci: 1e1c0000.xhci supply vusb33 not found, using dummy regulator
[ 7.079395] xhci-mtk 1e1c0000.xhci: xHCI Host Controller
[ 7.090003] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 1
[ 7.107764] mtk_soc_eth 1e100000.ethernet eth0: port 0 link up
[ 7.116970] xhci-mtk 1e1c0000.xhci: hcc params 0x01401198 hci version 0x96 quirks 0x0000000000210010
[ 7.137629] xhci-mtk 1e1c0000.xhci: irq 20, io mem 0x1e1c0000
[ 7.150117] hub 1-0:1.0: USB hub found
[ 7.157694] hub 1-0:1.0: 2 ports detected
[ 7.166306] xhci-mtk 1e1c0000.xhci: xHCI Host Controller
[ 7.176947] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 2
[ 7.191864] xhci-mtk 1e1c0000.xhci: Host supports USB 3.0 SuperSpeed
[ 7.204888] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[ 7.221922] hub 2-0:1.0: USB hub found
[ 7.229485] hub 2-0:1.0: 1 port detected
[ 7.242097] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 7.277133] init: - preinit -
[ 8.714719] mtk_soc_eth 1e100000.ethernet: PPE started
[ 8.802186] random: procd: uninitialized urandom read (4 bytes read)
[ 13.008067] jffs2_scan_eraseblock(): End of filesystem marker found at 0x10000
[ 13.022478] jffs2_build_filesystem(): unlocking the mtd device...
[ 13.022484] done.
[ 13.038599] jffs2_build_filesystem(): erasing all blocks after the end marker...
[ 13.098904] random: crng init done
[ 58.910069] done.
[ 58.913934] jffs2: notice: (479) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
[ 58.946237] mount_root: overlay filesystem has not been fully initialized yet
[ 58.963132] mount_root: switching to jffs2 overlay
[ 58.988586] overlayfs: upper fs does not support tmpfile.
[ 59.455586] urandom-seed: Seed file not found (/etc/urandom.seed)
[ 59.555295] mtk_soc_eth 1e100000.ethernet: 0x100 = 0x6060000c, 0x10c = 0x80818
[ 59.577439] procd: - early -
[ 59.583269] procd: - watchdog -
[ 60.366974] procd: - watchdog -
[ 60.373543] procd: - ubus -
[ 60.557021] procd: - init -
[ 61.205918] kmodloader: loading kernel modules from /etc/modules.d/*
[ 61.220843] tun: Universal TUN/TAP device driver, 1.6
[ 61.235478] ip6_tables: (C) 2000-2006 Netfilter Core Team
[ 61.253862] Loading modules backported from Linux version v5.4-rc8-0-gaf42d3466bdc
[ 61.269028] Backport generated by backports.git v5.4-rc8-1-0-g368e8c51
[ 61.284018] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 61.301237] nf_conntrack version 0.5.0 (2048 buckets, 8192 max)
[ 61.354855] xt_time: kernel timezone is -0000
[ 61.359039] urngd: v1.0.2 started.
[ 61.415884] bus=0x1, slot = 0x0, irq=0xff
[ 61.424128] mt76x2e 0000:01:00.0: ASIC revision: 76120044
[ 62.087399] mt76x2e 0000:01:00.0: ROM patch build: 20141115060606a
[ 62.103082] mt76x2e 0000:01:00.0: Firmware Version: 0.0.00
[ 62.114034] mt76x2e 0000:01:00.0: Build: 1
[ 62.122190] mt76x2e 0000:01:00.0: Build Time: 201507311614____
[ 62.156809] mt76x2e 0000:01:00.0: Firmware running!
[ 62.169320] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 62.171946] bus=0x2, slot = 0x1, irq=0xff
[ 62.180232] mt76x2e 0000:02:00.0: ASIC revision: 76020044
[ 62.846919] mt76x2e 0000:02:00.0: ROM patch already applied
[ 62.859042] mt76x2e 0000:02:00.0: Firmware Version: 0.0.00
[ 62.870086] mt76x2e 0000:02:00.0: Build: 1
[ 62.878287] mt76x2e 0000:02:00.0: Build Time: 201507311614____
[ 62.906848] mt76x2e 0000:02:00.0: Firmware running!
[ 62.919098] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
[ 62.928443] PPP generic driver version 2.4.2
[ 62.939901] NET: Registered protocol family 24
[ 62.952544] kmodloader: done loading kernel modules from /etc/modules.d/*
[ 73.708821] mtk_soc_eth 1e100000.ethernet: PPE started
[ 73.726820] device eth0 entered promiscuous mode
[ 73.737842] br-lan: port 1(eth0.1) entered blocking state
[ 73.748873] br-lan: port 1(eth0.1) entered disabled state
[ 73.760375] device eth0.1 entered promiscuous mode
[ 73.773031] br-lan: port 1(eth0.1) entered blocking state
[ 73.783896] br-lan: port 1(eth0.1) entered forwarding state
[ 73.795517] IPv6: ADDRCONF(NETDEV_UP): br-lan: link is not ready
[ 74.800061] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
[ 76.890048] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 77.242140] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
[ 78.160659] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
[ 78.990646] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready