[PATCH] ARM: Fix r7/r11 confusion when CONFIG_THUMB2_KERNEL=y [OT]

Will Deacon will.deacon at arm.com
Wed Jul 31 06:38:47 EDT 2013 

[Adding Gregory, as this is a Marvell CPU]

On Wed, Jul 31, 2013 at 10:03:09AM +0100, Jean-Francois Moine wrote:
> I compiled the 3.11.0-rc3 with gcc-4.8.1 and I still get oops in ext3
> (no problem when compiled with gcc-4.6). Here is the dmesg.

There were some recent errata fixes from Gregory and I don't think they all
made it into mainline yet. Gregory -- does the panic below look like
something that could be related to the problems you were seeing with DMA?

Cheers,

Will

> Booting Linux on physical CPU 0x0
> Linux version 3.11.0-rc3-00004-g36f571e-dirty (jef at armhf) (gcc version 4.8.1 (Debian 4.8.1-8) ) #1 PREEMPT Wed Jul 31 09:22:30 CEST 2013
> CPU: ARMv7 Processor [560f5815] revision 5 (ARMv7), cr=10c53c7d
> CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
> Machine: Marvell Dove (Flattened Device Tree), model: SolidRun CuBox
> cma: CMA: reserved 32 MiB at 3e000000
> Memory policy: ECC disabled, Data cache writeback
> On node 0 totalpages: 262144
> free_area_init_node: node 0, pgdat 804ebd2c, node_mem_map 8075b000
>   Normal zone: 2048 pages used for memmap
>   Normal zone: 0 pages reserved
>   Normal zone: 262144 pages, LIFO batch:31
> CPU: All CPU(s) started in SVC mode.
> pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
> pcpu-alloc: [0] 0
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 260096
> Kernel command line: console=ttyS0,115200n8 console=tty1,115200 root=/dev/sda7 rootwait video=HDMI-A-1:1920x1080-32 at 60
> PID hash table entries: 4096 (order: 2, 16384 bytes)
> Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
> Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
> Memory: 1001516K/1048576K available (3715K kernel code, 177K rwdata, 980K rodata, 135K init, 129K bss, 47060K reserved)
> Virtual kernel memory layout:
>     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
>     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
>     vmalloc : 0xc0800000 - 0xff000000   (1000 MB)
>     lowmem  : 0x80000000 - 0xc0000000   (1024 MB)
>     modules : 0x7f000000 - 0x80000000   (  16 MB)
>       .text : 0x80008000 - 0x8049df34   (4696 kB)
>       .init : 0x8049e000 - 0x804bfe68   ( 136 kB)
>       .data : 0x804c0000 - 0x804ec5c0   ( 178 kB)
>        .bss : 0x804ec5c0 - 0x8050cad0   ( 130 kB)
> Preemptible hierarchical RCU implementation.
>         Dump stacks of tasks blocking RCU-preempt GP.
> NR_IRQS:135
> sched_clock: 32 bits at 166MHz, resolution 5ns, wraps every 25769ms
> Console: colour dummy device 80x30
> console [tty1] enabled
> Calibrating delay loop... 789.70 BogoMIPS (lpj=3948544)
> pid_max: default: 32768 minimum: 301
> Mount-cache hash table entries: 512
> CPU: Testing write buffer coherency: ok
> Setting up static identity map for 0x803a6620 - 0x803a6654
> devtmpfs: initialized
> pinctrl core: initialized pinctrl subsystem
> regulator-dummy: no parameters
> NET: Registered protocol family 16
> DMA: preallocated 256 KiB pool for atomic coherent allocations
> Dove 88AP510 SoC
> Tauros2: Disabling L2 prefetch.
> Tauros2: Disabling line fill burt8.
> Tauros2: Enabling L2 cache.
> Tauros2: L2 cache support initialised in ARMv7 mode.
> bio: create slab <bio-0> at 0
> USB Power: Failed to request enable GPIO1: -517
> reg-fixed-voltage 1.regulator: Failed to register regulator: -517
> platform 1.regulator: Driver reg-fixed-voltage requests probe deferral
> SCSI subsystem initialized
> libata version 3.00 loaded.
> usbcore: registered new interface driver usbfs
> usbcore: registered new interface driver hub
> usbcore: registered new device driver usb
> Linux video capture interface: v2.00
> Advanced Linux Sound Architecture Driver Initialized.
> Switched to clocksource orion_clocksource
> NET: Registered protocol family 2
> TCP established hash table entries: 8192 (order: 4, 65536 bytes)
> TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
> TCP: Hash tables configured (established 8192 bind 8192)
> TCP: reno registered
> UDP hash table entries: 512 (order: 1, 8192 bytes)
> UDP-Lite hash table entries: 512 (order: 1, 8192 bytes)
> NET: Registered protocol family 1
> audit: initializing netlink socket (disabled)
> type=2000 audit(0.070:1): initialized
> msgmni has been set to 2020
> io scheduler noop registered
> io scheduler deadline registered
> io scheduler cfq registered (default)
> dove-pinctrl f10d0200.pinctrl: registered pinctrl driver
> mv_xor f1060800.dma-engine: Marvell shared XOR driver
> mv_xor f1060800.dma-engine: Marvell XOR: ( xor cpy )
> mv_xor f1060800.dma-engine: Marvell XOR: ( xor cpy )
> mv_xor f1060900.dma-engine: Marvell shared XOR driver
> mv_xor f1060900.dma-engine: Marvell XOR: ( xor cpy )
> mv_xor f1060900.dma-engine: Marvell XOR: ( xor cpy )
> Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
> f1012000.serial: ttyS0 at MMIO 0xf1012000 (irq = 7) is a 16550A
> console [ttyS0] enabled
> brd: module loaded
> sata_mv f10a0000.sata: version 1.28
> sata_mv f10a0000.sata: slots 32 ports 1
> scsi0 : sata_mv
> ata1: SATA max UDMA/133 irq 62
> libphy: orion_mdio_bus: probed
> mv643xx_eth: MV-643xx 10/100/1000 ethernet driver version 1.4
> libphy: PHY orion-mdio-mii:08 not found
> libphy: PHY orion-mdio-mii:09 not found
> libphy: PHY orion-mdio-mii:0a not found
> libphy: PHY orion-mdio-mii:0b not found
> libphy: PHY orion-mdio-mii:0c not found
> libphy: PHY orion-mdio-mii:0d not found
> libphy: PHY orion-mdio-mii:0e not found
> libphy: PHY orion-mdio-mii:0f not found
> libphy: PHY orion-mdio-mii:10 not found
> libphy: PHY orion-mdio-mii:11 not found
> libphy: PHY orion-mdio-mii:12 not found
> libphy: PHY orion-mdio-mii:13 not found
> libphy: PHY orion-mdio-mii:14 not found
> libphy: PHY orion-mdio-mii:15 not found
> libphy: PHY orion-mdio-mii:16 not found
> libphy: PHY orion-mdio-mii:17 not found
> libphy: PHY orion-mdio-mii:18 not found
> libphy: PHY orion-mdio-mii:19 not found
> libphy: PHY orion-mdio-mii:1a not found
> libphy: PHY orion-mdio-mii:1b not found
> libphy: PHY orion-mdio-mii:1c not found
> libphy: PHY orion-mdio-mii:1d not found
> libphy: PHY orion-mdio-mii:1e not found
> libphy: PHY orion-mdio-mii:1f not found
> libphy: PHY orion-mdio-mii:00 not found
> mv643xx_eth_port mv643xx_eth_port.0 eth0: port 0 with MAC address 00:50:43:b6:3b:10
> ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> ehci-orion: EHCI orion driver
> orion-ehci f1050000.usb-host: EHCI Host Controller
> orion-ehci f1050000.usb-host: new USB bus registered, assigned bus number 1
> orion-ehci f1050000.usb-host: irq 24, io mem 0xf1050000
> orion-ehci f1050000.usb-host: USB 2.0 started, EHCI 1.00
> hub 1-0:1.0: USB hub found
> hub 1-0:1.0: 1 port detected
> orion-ehci f1051000.usb-host: EHCI Host Controller
> orion-ehci f1051000.usb-host: new USB bus registered, assigned bus number 2
> orion-ehci f1051000.usb-host: irq 25, io mem 0xf1051000
> orion-ehci f1051000.usb-host: USB 2.0 started, EHCI 1.00
> hub 2-0:1.0: USB hub found
> hub 2-0:1.0: 1 port detected
> usbcore: registered new interface driver usb-storage
> mousedev: PS/2 mouse device common for all mice
> rtc-mv f10d8500.rtc: rtc core: registered f10d8500.rtc as rtc0
> sdhci: Secure Digital Host Controller Interface driver
> sdhci: Copyright(c) Pierre Ossman
> sdhci-pltfm: SDHCI platform and OF driver helper
> mmc0: no vqmmc regulator found
> mmc0: no vmmc regulator found
> mmc0: SDHCI controller on f1092000.sdio [f1092000.sdio] using DMA
> usbcore: registered new interface driver usbhid
> usbhid: USB HID core driver
> TCP: cubic registered
> NET: Registered protocol family 10
> NET: Registered protocol family 17
> VFP support v0.3: implementor 56 architecture 2 part 20 variant 9 rev 5
> ThumbEE CPU extension supported.
> PJ4 iWMMXt coprocessor enabled.
> USB Power: 5000 mV
> rtc-mv f10d8500.rtc: setting system clock to 2013-07-31 08:15:22 UTC (1375258522)
> ALSA device list:
>   No soundcards found.
> ata1: SATA link down (SStatus 0 SControl F300)
> mmc0: new high speed SDHC card at address e624
> mmcblk0: mmc0:e624 SU16G 14.8 GiB
>  mmcblk0: p1 p2 p3
> Waiting for root device /dev/sda7...
> usb 1-1: new high-speed USB device number 2 using orion-ehci
> usb-storage 1-1:1.0: USB Mass Storage device detected
> scsi1 : usb-storage 1-1:1.0
> usb 2-1: new high-speed USB device number 2 using orion-ehci
> hub 2-1:1.0: USB hub found
> hub 2-1:1.0: 4 ports detected
> usb 2-1.4: new high-speed USB device number 3 using orion-ehci
> hub 2-1.4:1.0: USB hub found
> hub 2-1.4:1.0: 4 ports detected
> usb 2-1.4.2: new high-speed USB device number 4 using orion-ehci
> scsi 1:0:0:0: Direct-Access     WDC WD25 00JB-55REA0      20.0 PQ: 0 ANSI: 0
> sd 1:0:0:0: [sda] 488397168 512-byte logical blocks: (250 GB/232 GiB)
> sd 1:0:0:0: [sda] Write Protect is off
> sd 1:0:0:0: [sda] Mode Sense: 03 00 00 00
> sd 1:0:0:0: [sda] No Caching mode page present
> sd 1:0:0:0: [sda] Assuming drive cache: write through
> sd 1:0:0:0: [sda] No Caching mode page present
> sd 1:0:0:0: [sda] Assuming drive cache: write through
>  sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 >
> sd 1:0:0:0: [sda] No Caching mode page present
> sd 1:0:0:0: [sda] Assuming drive cache: write through
> sd 1:0:0:0: [sda] Attached SCSI disk
> EXT3-fs (sda7): mounted filesystem with ordered data mode
> kjournald starting.  Commit interval 5 seconds
> usb 2-1.4.3: new low-speed USB device number 5 using orion-ehci
> VFS: Mounted root (ext3 filesystem) readonly on device 8:7.
> devtmpfs: mounted
> Freeing unused kernel memory: 132K (8049e000 - 804bf000)
> input: Generic USB K/B as /devices/soc.0/f1051000.usb-host/usb2/2-1/2-1.4/2-1.4.3/2-1.4.3:1.0/input/input0
> hid-generic 0003:13BA:0017.0001: input: USB HID v1.10 Keyboard [Generic USB K/B] on usb-f1051000.usb-host-1.4.3/input0
> input: Generic USB K/B as /devices/soc.0/f1051000.usb-host/usb2/2-1/2-1.4/2-1.4.3/2-1.4.3:1.1/input/input1
> hid-generic 0003:13BA:0017.0002: input: USB HID v1.10 Mouse [Generic USB K/B] on usb-f1051000.usb-host-1.4.3/input1
> udevd[583]: starting version 175
> [drm] Initialized drm 1.1.0 20060810
> cfg80211: Calling CRDA to update world regulatory domain
> simple-dt-audio sound.5:  dit-hifi <-> f10b4000.audio-controller mapping ok
> tda998x 0-0070: found TDA19988
> [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
> [drm] No driver support for vblank timestamp query.
> usb 2-1.4.2: reset high-speed USB device number 4 using orion-ehci
> usb 2-1.4.2: Loading firmware file isl3887usb
> usbcore: registered new interface driver p54usb
> ieee80211 phy0: p54 detected a LM87 firmware
> p54: rx_mtu reduced from 3240 to 2384
> ieee80211 phy0: FW rev 2.13.25.0 - Softmac protocol 5.9
> ieee80211 phy0: cryptographic accelerator WEP:YES, TKIP:YES, CCMP:YES
> Console: switching to colour frame buffer device 240x67
> dove-drm video.6: fb0:  frame buffer device
> dove-drm video.6: registered panic notifier
> [drm] Initialized dove-drm 1.0.0 20130516 on minor 0
> ieee80211 phy0: hwaddr 00:12:bf:1e:9c:e4, MAC:isl3887 RF:Frisbee
> ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
> usb 2-1.4.2: is registered as 'phy0'
> Unable to handle kernel NULL pointer dereference at virtual address 00000003
> pgd = bd374000
> [00000003] *pgd=3d3af831, *pte=00000000, *ppte=00000000
> Internal error: Oops: 811 [#1] PREEMPT ARM
> Modules linked in: arc4 p54usb p54common crc_ccitt fbcon bitblit mac80211 softcursor font cfg80211 dove_drm tda998x drm_kms_helper drm clk_si5351 snd_soc_simple_dt_card snd_soc_spdif_tx mv_cesa snd_soc_kirkwood
> CPU: 0 PID: 731 Comm: usb-db Not tainted 3.11.0-rc3-00004-g36f571e-dirty #1
> task: bda0dc00 ti: bd2fa000 task.ti: bd2fa000
> PC is at do_mpage_readpage+0x754/0x888
> LR is at bio_add_page+0x44/0x4c
> pc : [<800e89c0>]    lr : [<800e05e4>]    psr: 600e0013
> sp : bd2fbc74  ip : bd2fbcc8  fp : bd2fbc9c
> r10: 00000003  r9 : 00000000  r8 : 00000004
> r7 : 00000001  r6 : 800e8ca4  r5 : bd2fbc70  r4 : 00000003
> r3 : 00001000  r2 : 00000003  r1 : 00000000  r0 : bd2fbc9c
> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
> Control: 10c5387d  Table: 3d374019  DAC: 00000015
> Process usb-db (pid: 731, stack limit = 0xbd2fa240)
> Stack: (0xbd2fbc74 to 0xbd2fc000)
> bc60:                                              00000001 bd2fbd64 00200200
> bc80: 00100100 bd53cd54 bd9f1340 80eed380 bd2fbd34 bd2fbca0 800e8bc8 800e8278
> bca0: bd2fbcc8 bd2fbcbc 8011c554 000000c1 804ebd2c 8011c554 00000002 00000003
> bcc0: 0028de87 00000000 00000000 bd2fbcd8 80eed380 803a2f54 0028df40 00000000
> bce0: 00001000 00000000 bd402ac0 8003b810 bd2fbcf0 bd2fbcf0 bd53ccb4 bd2fbd7c
> bd00: bd53ccbc 00000002 bd2fbd24 8011a00c 00000004 00000004 00000000 0000007a
> bd20: 00000000 00000004 bd2fbd44 bd2fbd38 8011a030 800e8b00 bd2fbdac bd2fbd48
> bd40: 8007dd28 8011a018 bda54780 00000001 bd53cd54 00000004 bd53cd58 bd2fbd64
> bd60: 800c23bc bd2fbd64 bd2fbd64 91827364 bd8d5de8 bd8d5de8 bd2fbd78 bd2fbd78
> bd80: 800add50 bd53cd54 bda54780 bda547c8 00000000 00000020 00000003 bd53cd54
> bda0: bd2fbdec bd2fbdb0 8007e0e0 8007db44 00000003 bd11e470 bd95462c bdbe1540
> bdc0: bd2fbddc bd53cd54 00000000 00000000 bd53cc98 00000001 00000000 bda54780
> bde0: bd2fbe0c bd2fbdf0 8007e3b8 8007dfc4 00000000 00000001 00000000 bd53cd54
> be00: bd2fbeac bd2fbe10 8007471c 8007e378 00000001 bd954b78 bd9545f8 bd9545f8
> be20: 76f24000 76f25000 00000001 00080001 bd2fbeb8 bd2fbec0 ffffffff 00000000
> be40: 00000000 bdbe1540 00000001 bd954608 00000001 00000fff bd2fa000 bda547c8
> be60: 00000000 00000001 76f25000 00000000 00000000 00001000 76f24000 00000000
> be80: 80097780 00000000 00000000 00001000 bd2fbf78 bda54780 bda0dc00 00020000
> bea0: bd2fbf44 bd2fbeb0 800abf60 800741cc 00000000 00000000 76f24000 00001000
> bec0: 00000001 bda54780 00000000 00000000 00000000 bda0dc00 00000000 00000000
> bee0: 00000000 00000000 00000000 00000000 00001000 00000000 00001000 00000000
> bf00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> bf20: bda54780 76f24000 bd2fbf78 76f24000 00000000 00001000 bd2fbf74 bd2fbf48
> bf40: 800ac69c 800abeec 00800007 00000022 00000000 00000000 bda54780 76f24000
> bf60: 00000000 00001000 bd2fbfa4 bd2fbf78 800acd84 800ac608 00000000 00000000
> bf80: 017f7278 76ec7c58 00000000 00000003 8000e604 bd2fa000 00000000 bd2fbfa8
> bfa0: 8000e480 800acd4c 017f7278 76ec7c58 00000003 76f24000 00001000 00000000
> bfc0: 017f7278 76ec7c58 00000000 00000003 7eac3ad0 7eac3ad4 76f29000 00000000
> bfe0: 00000000 7eac3a64 76e389cf 76e6f21c 400e0010 00000003 00000000 00000000
> Backtrace:
> [<800e826c>] (do_mpage_readpage+0x0/0x888) from [<800e8bc8>] (mpage_readpages+0xd4/0x130)
> [<800e8af4>] (mpage_readpages+0x0/0x130) from [<8011a030>] (ext3_readpages+0x24/0x28)
> [<8011a00c>] (ext3_readpages+0x0/0x28) from [<8007dd28>] (__do_page_cache_readahead+0x1f0/0x2d8)
> [<8007db38>] (__do_page_cache_readahead+0x0/0x2d8) from [<8007e0e0>] (ondemand_readahead+0x128/0x238)
> [<8007dfb8>] (ondemand_readahead+0x0/0x238) from [<8007e3b8>] (page_cache_sync_readahead+0x4c/0x6c)
> [<8007e36c>] (page_cache_sync_readahead+0x0/0x6c) from [<8007471c>] (generic_file_aio_read+0x55c/0x7c0)
>  r4:bd53cd54
> [<800741c0>] (generic_file_aio_read+0x0/0x7c0) from [<800abf60>] (do_sync_read+0x80/0xa8)
> [<800abee0>] (do_sync_read+0x0/0xa8) from [<800ac69c>] (vfs_read+0xa0/0x148)
>  r9:00001000 r8:00000000 r7:76f24000 r6:bd2fbf78 r5:76f24000
> r4:bda54780
> [<800ac5fc>] (vfs_read+0x0/0x148) from [<800acd84>] (SyS_read+0x44/0x80)
>  r9:00001000 r8:00000000 r7:76f24000 r6:bda54780 r5:00000000
> r4:00000000
> [<800acd40>] (SyS_read+0x0/0x80) from [<8000e480>] (ret_fast_syscall+0x0/0x30)
>  r9:bd2fa000 r8:8000e604 r7:00000003 r6:00000000 r5:76ec7c58
> r4:017f7278
> Code: e0854184 e51b0084 e14424d8 e51b40a0 (e1c420f0)
> ---[ end trace e23d6b4d1dcd7a83 ]---
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 731 at /home/jef/kernel/kernel/exit.c:703 do_exit+0x54/0x900()
> Modules linked in: arc4 p54usb p54common crc_ccitt fbcon bitblit mac80211 softcursor font cfg80211 dove_drm tda998x drm_kms_helper drm clk_si5351 snd_soc_simple_dt_card snd_soc_spdif_tx mv_cesa snd_soc_kirkwood
> CPU: 0 PID: 731 Comm: usb-db Tainted: G      D      3.11.0-rc3-00004-g36f571e-dirty #1
> Backtrace:
> [<800112c4>] (dump_backtrace+0x0/0x110) from [<800114dc>] (show_stack+0x18/0x1c)
>  r6:000002bf r5:00000009 r4:00000000 r3:00000000
> [<800114c4>] (show_stack+0x0/0x1c) from [<803a25b0>] (dump_stack+0x24/0x28)
> [<803a258c>] (dump_stack+0x0/0x28) from [<8001ad28>] (warn_slowpath_common+0x74/0x8c)
> [<8001acb4>] (warn_slowpath_common+0x0/0x8c) from [<8001ade4>] (warn_slowpath_null+0x24/0x2c)
>  r8:00000811 r7:bd2fa000 r6:80439cc4 r5:0000000b r4:804cb598
> [<8001adc0>] (warn_slowpath_null+0x0/0x2c) from [<8001f248>] (do_exit+0x54/0x900)
> [<8001f1f4>] (do_exit+0x0/0x900) from [<80011664>] (die+0x184/0x238)
>  r7:bd2fa000
> [<800114e0>] (die+0x0/0x238) from [<803a07dc>] (__do_kernel_fault.part.10+0x6c/0x7c)
> [<803a0770>] (__do_kernel_fault.part.10+0x0/0x7c) from [<8001420c>] (do_sect_fault+0x0/0x18)
>  r7:bdbe1540 r3:bd2fbc28
> [<8001417c>] (do_bad_area+0x0/0x90) from [<80015d10>] (do_alignment+0xd0/0x844)
>  r7:00000003 r6:800e89c0 r5:804ec85c r4:bd2fbc28
> [<80015c40>] (do_alignment+0x0/0x844) from [<80008460>] (do_DataAbort+0x40/0xa0)
> [<80008420>] (do_DataAbort+0x0/0xa0) from [<80011fb8>] (__dabt_svc+0x38/0x60)
> Exception stack(0xbd2fbc28 to 0xbd2fbc70)
> bc20:                   bd2fbc9c 00000000 00000003 00001000 00000003 bd2fbc70
> bc40: 800e8ca4 00000001 00000004 00000000 00000003 bd2fbc9c bd2fbcc8 bd2fbc74
> bc60: 800e05e4 800e89c0 600e0013 ffffffff
>  r8:00000004 r7:bd2fbc5c r6:ffffffff r5:600e0013 r4:800e89c0
> [<800e826c>] (do_mpage_readpage+0x0/0x888) from [<800e8bc8>] (mpage_readpages+0xd4/0x130)
> [<800e8af4>] (mpage_readpages+0x0/0x130) from [<8011a030>] (ext3_readpages+0x24/0x28)
> [<8011a00c>] (ext3_readpages+0x0/0x28) from [<8007dd28>] (__do_page_cache_readahead+0x1f0/0x2d8)
> [<8007db38>] (__do_page_cache_readahead+0x0/0x2d8) from [<8007e0e0>] (ondemand_readahead+0x128/0x238)
> [<8007dfb8>] (ondemand_readahead+0x0/0x238) from [<8007e3b8>] (page_cache_sync_readahead+0x4c/0x6c)
> [<8007e36c>] (page_cache_sync_readahead+0x0/0x6c) from [<8007471c>] (generic_file_aio_read+0x55c/0x7c0)
>  r4:bd53cd54
> [<800741c0>] (generic_file_aio_read+0x0/0x7c0) from [<800abf60>] (do_sync_read+0x80/0xa8)
> [<800abee0>] (do_sync_read+0x0/0xa8) from [<800ac69c>] (vfs_read+0xa0/0x148)
>  r9:00001000 r8:00000000 r7:76f24000 r6:bd2fbf78 r5:76f24000
> r4:bda54780
> [<800ac5fc>] (vfs_read+0x0/0x148) from [<800acd84>] (SyS_read+0x44/0x80)
>  r9:00001000 r8:00000000 r7:76f24000 r6:bda54780 r5:00000000
> r4:00000000
> [<800acd40>] (SyS_read+0x0/0x80) from [<8000e480>] (ret_fast_syscall+0x0/0x30)
>  r9:bd2fa000 r8:8000e604 r7:00000003 r6:00000000 r5:76ec7c58
> r4:017f7278
> ---[ end trace e23d6b4d1dcd7a84 ]---
> EXT3-fs (sda7): using internal journal
> IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
> wlan1: authenticate with 00:24:d4:9c:29:68
> wlan1: send auth to 00:24:d4:9c:29:68 (try 1/3)
> wlan1: authenticated
> p54usb 2-1.4.2:1.0 wlan1: disabling HT/VHT due to WEP/TKIP use
> wlan1: associate with 00:24:d4:9c:29:68 (try 1/3)
> wlan1: RX AssocResp from 00:24:d4:9c:29:68 (capab=0x411 status=0 aid=1)
> IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
> wlan1: associated
> 
> --
> Ken ar c'hentañ |             ** Breizh ha Linux atav! **
> Jef             |               http://moinejf.free.fr/
>

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