pi@raspberrypi:~ $ dmesg
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.14.50+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1122 Tue Jun 19 12:21:21 BST 2018
[    0.000000] CPU: ARMv6-compatible processor [410fb767] revision 7 (ARMv7), cr=00c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
[    0.000000] OF: fdt: Machine model: Raspberry Pi Zero W Rev 1.1
[    0.000000] Memory policy: Data cache writeback
[    0.000000] cma: Reserved 8 MiB at 0x17400000
[    0.000000] On node 0 totalpages: 98304
[    0.000000] free_area_init_node: node 0, pgdat c09c04f8, node_mem_map d7c8a400
[    0.000000]   Normal zone: 864 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 98304 pages, LIFO batch:31
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 97440
[    0.000000] Kernel command line: 8250.nr_uarts=0 bcm2708_fb.fbwidth=1280 bcm2708_fb.fbheight=720 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:7F:71:87 vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000  dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p7 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait splash plymouth.ignore-serial-consoles
[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Memory: 370300K/393216K available (6421K kernel code, 587K rwdata, 1988K rodata, 440K init, 677K bss, 14724K reserved, 8192K cma-reserved)
[    0.000000] Virtual kernel memory layout:
                   vector  : 0xffff0000 - 0xffff1000   (   4 kB)
                   fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
                   vmalloc : 0xd8800000 - 0xff800000   ( 624 MB)
                   lowmem  : 0xc0000000 - 0xd8000000   ( 384 MB)
                   modules : 0xbf000000 - 0xc0000000   (  16 MB)
                     .text : 0xc0008000 - 0xc064d94c   (6423 kB)
                     .init : 0xc08ca000 - 0xc0938000   ( 440 kB)
                     .data : 0xc0938000 - 0xc09cae90   ( 588 kB)
                      .bss : 0xc09d07d0 - 0xc0a79d24   ( 678 kB)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] ftrace: allocating 24091 entries in 71 pages
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000029] sched_clock: 32 bits at 1000kHz, resolution 1000ns, wraps every 2147483647500ns
[    0.000071] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns
[    0.000161] bcm2835: system timer (irq = 27)
[    0.000721] Console: colour dummy device 80x30
[    0.001307] console [tty1] enabled
[    0.001358] Calibrating delay loop... 697.95 BogoMIPS (lpj=3489792)
[    0.060335] pid_max: default: 32768 minimum: 301
[    0.060850] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.060905] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.062208] Disabling memory control group subsystem
[    0.062424] CPU: Testing write buffer coherency: ok
[    0.063553] Setting up static identity map for 0x8200 - 0x8238
[    0.064830] devtmpfs: initialized
[    0.073899] random: get_random_u32 called from bucket_table_alloc+0x88/0x1c4 with crng_init=0
[    0.074902] VFP support v0.3: implementor 41 architecture 1 part 20 variant b rev 5
[    0.075330] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.075404] futex hash table entries: 256 (order: -1, 3072 bytes)
[    0.076768] pinctrl core: initialized pinctrl subsystem
[    0.078153] NET: Registered protocol family 16
[    0.081226] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[    0.087711] hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
[    0.087783] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    0.087968] Serial: AMBA PL011 UART driver
[    0.090997] bcm2835-mbox 2000b880.mailbox: mailbox enabled
[    0.091780] uart-pl011 20201000.serial: could not find pctldev for node /soc/gpio@7e200000/uart0_pins, deferring probe
[    0.132105] bcm2835-dma 20007000.dma: DMA legacy API manager at d880d000, dmachans=0x1
[    0.134361] SCSI subsystem initialized
[    0.134636] usbcore: registered new interface driver usbfs
[    0.134770] usbcore: registered new interface driver hub
[    0.135004] usbcore: registered new device driver usb
[    0.140806] raspberrypi-firmware soc:firmware: Attached to firmware from 2018-06-07 15:37
[    0.142930] clocksource: Switched to clocksource timer
[    0.229778] VFS: Disk quotas dquot_6.6.0
[    0.229958] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    0.230282] FS-Cache: Loaded
[    0.230648] CacheFiles: Loaded
[    0.247767] NET: Registered protocol family 2
[    0.248994] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[    0.249128] TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
[    0.249247] TCP: Hash tables configured (established 4096 bind 4096)
[    0.249427] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.249487] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.249870] NET: Registered protocol family 1
[    0.250617] RPC: Registered named UNIX socket transport module.
[    0.250671] RPC: Registered udp transport module.
[    0.250698] RPC: Registered tcp transport module.
[    0.250721] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.252727] hw perfevents: no irqs for PMU, sampling events not supported
[    0.252851] hw perfevents: enabled with armv6_1176 PMU driver, 3 counters available
[    0.256652] workingset: timestamp_bits=14 max_order=17 bucket_order=3
[    0.268902] FS-Cache: Netfs 'nfs' registered for caching
[    0.270283] NFS: Registering the id_resolver key type
[    0.270376] Key type id_resolver registered
[    0.270407] Key type id_legacy registered
[    0.270455] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.275195] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[    0.275674] io scheduler noop registered
[    0.275722] io scheduler deadline registered (default)
[    0.276290] io scheduler cfq registered
[    0.276337] io scheduler mq-deadline registered
[    0.276366] io scheduler kyber registered
[    0.278694] BCM2708FB: allocated DMA memory 57500000
[    0.278807] BCM2708FB: allocated DMA channel 0 @ d880d000
[    0.301241] Console: switching to colour frame buffer device 160x45
[    0.320948] bcm2835-rng 20104000.rng: hwrng registered
[    0.321424] vc-mem: phys_addr:0x00000000 mem_base=0x1ec00000 mem_size:0x20000000(512 MiB)
[    0.322790] vc-sm: Videocore shared memory driver
[    0.323754] gpiomem-bcm2835 20200000.gpiomem: Initialised: Registers at 0x20200000
[    0.343479] brd: module loaded
[    0.356152] loop: module loaded
[    0.356338] Loading iSCSI transport class v2.0-870.
[    0.357404] usbcore: registered new interface driver smsc95xx
[    0.357664] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[    0.586249] Core Release: 2.80a
[    0.591967] Setting default values for core params
[    0.597604] Finished setting default values for core params
[    0.803592] Using Buffer DMA mode
[    0.809177] Periodic Transfer Interrupt Enhancement - disabled
[    0.814736] Multiprocessor Interrupt Enhancement - disabled
[    0.820306] OTG VER PARAM: 0, OTG VER FLAG: 0
[    0.825922] Dedicated Tx FIFOs mode
[    0.832295] WARN::dwc_otg_hcd_init:1046: FIQ DMA bounce buffers: virt = 0xd7514000 dma = 0x57514000 len=9024
[    0.838276] FIQ FSM acceleration enabled for :
               Non-periodic Split Transactions
               Periodic Split Transactions
               High-Speed Isochronous Endpoints
               Interrupt/Control Split Transaction hack enabled
[    0.866732] dwc_otg: Microframe scheduler enabled
[    0.867000] WARN::hcd_init_fiq:459: FIQ on core 0 at 0xc049a168
[    0.872697] WARN::hcd_init_fiq:460: FIQ ASM at 0xc049a444 length 36
[    0.878251] WARN::hcd_init_fiq:486: MPHI regs_base at 0xd88a5000
[    0.883984] dwc_otg 20980000.usb: DWC OTG Controller
[    0.889639] dwc_otg 20980000.usb: new USB bus registered, assigned bus number 1
[    0.895440] dwc_otg 20980000.usb: irq 56, io mem 0x00000000
[    0.901116] Init: Port Power? op_state=1
[    0.906691] Init: Power Port (0)
[    0.912444] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    0.918132] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.923820] usb usb1: Product: DWC OTG Controller
[    0.929387] usb usb1: Manufacturer: Linux 4.14.50+ dwc_otg_hcd
[    0.935092] usb usb1: SerialNumber: 20980000.usb
[    0.942051] hub 1-0:1.0: USB hub found
[    0.947955] hub 1-0:1.0: 1 port detected
[    0.954724] dwc_otg: FIQ enabled
[    0.954735] dwc_otg: NAK holdoff enabled
[    0.954741] dwc_otg: FIQ split-transaction FSM enabled
[    0.954761] Module dwc_common_port init
[    0.955269] usbcore: registered new interface driver usb-storage
[    0.961528] mousedev: PS/2 mouse device common for all mice
[    0.967400] IR NEC protocol handler initialized
[    0.973036] IR RC5(x/sz) protocol handler initialized
[    0.978508] IR RC6 protocol handler initialized
[    0.983961] IR JVC protocol handler initialized
[    0.989235] IR Sony protocol handler initialized
[    0.994540] IR SANYO protocol handler initialized
[    0.999818] IR Sharp protocol handler initialized
[    1.005043] IR MCE Keyboard/mouse protocol handler initialized
[    1.010263] IR XMP protocol handler initialized
[    1.016829] bcm2835-wdt 20100000.watchdog: Broadcom BCM2835 watchdog timer
[    1.022798] bcm2835-cpufreq: min=700000 max=1000000
[    1.028873] sdhci: Secure Digital Host Controller Interface driver
[    1.034350] sdhci: Copyright(c) Pierre Ossman
[    1.040327] mmc-bcm2835 20300000.mmc: could not get clk, deferring probe
[    1.046517] sdhost-bcm2835 20202000.mmc: could not get clk, deferring probe
[    1.052219] sdhci-pltfm: SDHCI platform and OF driver helper
[    1.058379] ledtrig-cpu: registered to indicate activity on CPUs
[    1.064237] hidraw: raw HID events driver (C) Jiri Kosina
[    1.069800] usbcore: registered new interface driver usbhid
[    1.075169] usbhid: USB HID core driver
[    1.081407] vchiq: vchiq_init_state: slot_zero = d7580000, is_master = 0
[    1.089045] [vc_sm_connected_init]: start
[    1.100486] [vc_sm_connected_init]: end - returning 0
[    1.107178] Initializing XFRM netlink socket
[    1.112648] NET: Registered protocol family 17
[    1.118262] Key type dns_resolver registered
[    1.125637] registered taskstats version 1
[    1.139309] uart-pl011 20201000.serial: cts_event_workaround enabled
[    1.144995] 20201000.serial: ttyAMA0 at MMIO 0x20201000 (irq = 81, base_baud = 0) is a PL011 rev2
[    1.153725] mmc-bcm2835 20300000.mmc: mmc_debug:0 mmc_debug2:0
[    1.159427] mmc-bcm2835 20300000.mmc: DMA channel allocated
[    1.226505] sdhost: log_buf @ d7513000 (57513000)
[    1.267443] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    1.274770] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    1.281814] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    1.290293] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    1.310551] random: fast init done
[    1.315927] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[    1.322487] of_cfs_init
[    1.348284] of_cfs_init: OK
[    1.355004] Waiting for root device /dev/mmcblk0p7...
[    1.410776] mmc0: host does not support reading read-only switch, assuming write-enable
[    1.419052] mmc0: new high speed SDHC card at address 0007
[    1.425805] mmcblk0: mmc0:0007 SD16G 14.6 GiB
[    1.437372]  mmcblk0: p1 p2 < p5 p6 p7 >
[    1.474189] mmc1: new high speed SDIO card at address 0001
[    1.483958] EXT4-fs (mmcblk0p7): INFO: recovery required on readonly filesystem
[    1.489694] EXT4-fs (mmcblk0p7): write access will be enabled during recovery
[    5.584810] EXT4-fs (mmcblk0p7): orphan cleanup on readonly fs
[    5.591975] EXT4-fs (mmcblk0p7): 6 orphan inodes deleted
[    5.597574] EXT4-fs (mmcblk0p7): recovery complete
[    7.202589] EXT4-fs (mmcblk0p7): mounted filesystem with ordered data mode. Opts: (null)
[    7.208376] VFS: Mounted root (ext4 filesystem) readonly on device 179:7.
[    7.224381] devtmpfs: mounted
[    7.232365] Freeing unused kernel memory: 440K
[    7.237845] This architecture does not have kernel memory protection.
[    7.765883] systemd[1]: System time before build time, advancing clock.
[    7.937488] NET: Registered protocol family 10
[    7.945263] Segment Routing with IPv6
[    7.965668] ip_tables: (C) 2000-2006 Netfilter Core Team
[    7.997547] random: systemd: uninitialized urandom read (16 bytes read)
[    8.012900] systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[    8.026238] systemd[1]: Detected architecture arm.
[    8.055479] systemd[1]: Set hostname to <raspberrypi>.
[    8.117686] random: systemd: uninitialized urandom read (16 bytes read)
[    8.349461] random: systemd-cryptse: uninitialized urandom read (16 bytes read)
[    9.189894] systemd[1]: Listening on Journal Socket (/dev/log).
[    9.204983] systemd[1]: Listening on udev Control Socket.
[    9.219628] systemd[1]: Listening on Journal Socket.
[    9.234556] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[    9.249161] systemd[1]: Reached target Swap.
[    9.264260] systemd[1]: Listening on Syslog Socket.
[    9.280512] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[    9.688662] i2c /dev entries driver
[   11.874390] EXT4-fs (mmcblk0p7): re-mounted. Opts: (null)
[   12.581750] systemd-journald[61]: Received request to flush runtime journal from PID 1
[   15.794369] snd-hifiberry-dac soc:sound: pcm5102a-hifi <-> 20203000.i2s mapping ok
[   16.510619] brcmfmac: F1 signature read @0x18000000=0x1541a9a6
[   16.533510] brcmfmac: brcmf_fw_map_chip_to_name: using brcm/brcmfmac43430-sdio.bin for chip 0x00a9a6(43430) rev 0x000001
[   16.533933] usbcore: registered new interface driver brcmfmac
[   16.903137] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Oct 23 2017 03:55:53 version 7.45.98.38 (r674442 CY) FWID 01-e58d219f
[   16.905345] brcmfmac: brcmf_c_preinit_dcmds: CLM version = API: 12.2 Data: 7.11.15 Compiler: 1.24.2 ClmImport: 1.24.1 Creation: 2014-05-26 10:53:55 Inc Data: 9.10.39 Inc Compiler: 1.29.4 Inc ClmImport: 1.36.3 Creation: 2017-10-23 03:47:14 
[   20.939437] uart-pl011 20201000.serial: no DMA platform data
[   23.573081] Adding 102396k swap on /var/swap.  Priority:-2 extents:1 across:102396k SSFS
[   25.693125] Bluetooth: Core ver 2.22
[   25.693283] NET: Registered protocol family 31
[   25.693291] Bluetooth: HCI device and connection manager initialized
[   25.693315] Bluetooth: HCI socket layer initialized
[   25.693329] Bluetooth: L2CAP socket layer initialized
[   25.693375] Bluetooth: SCO socket layer initialized
[   25.719017] Bluetooth: HCI UART driver ver 2.3
[   25.719035] Bluetooth: HCI UART protocol H4 registered
[   25.719040] Bluetooth: HCI UART protocol Three-wire (H5) registered
[   25.721694] Bluetooth: HCI UART protocol Broadcom registered
[   26.021296] random: crng init done
[   26.021315] random: 7 urandom warning(s) missed due to ratelimiting
[   26.082388] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   26.082406] brcmfmac: power management disabled
[   26.306505] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   26.306518] Bluetooth: BNEP filters: protocol multicast
[   26.306542] Bluetooth: BNEP socket layer initialized
[   26.953354] Bluetooth: RFCOMM TTY layer initialized
[   26.953388] Bluetooth: RFCOMM socket layer initialized
[   26.953424] Bluetooth: RFCOMM ver 1.11
[   28.092335] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   35.865359] fuse init (API version 7.26)
[   56.526878] EXT4-fs (mmcblk0p5): mounted filesystem with ordered data mode. Opts: (null)