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    SubjectRe: v3.4 boot failure on qemu-system-arm -M versatilepb
    Adding linux-arm-kernel...

    On 05/28/2012 09:22 AM, takuo.koguchi.sw@hitachi.com wrote:
    > Hi,
    >
    > I found linux-3.4 kernel fails to mount the rootfs on
    > "qemu-system-arm -M versatile."
    >
    > Git bisect shows commit c334bc1 cause this first.
    >
    > So I tried to revert it by putting
    > arch/arm/mach-versatile/include/mach/io.h and adding select
    > NEED_MACH_IO_H in the section of ARCH_VERSATILE in arch/arm/Kconfig,
    > then the kernel can mount the rootfs.
    >
    > Can someone confirm and fix this?
    >

    What config are you using, and what is your kernel command line?

    Rob

    > Takuo Koguchi
    >
    >
    > ----------- Uncompressing Linux... done, booting the kernel. Booting
    > Linux on physical CPU 0 Initializing cgroup subsys cpuset
    > Initializing cgroup subsys cpu Linux version 3.4.0-yocto-standard
    > (koguchi@mg70k) (gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41) )
    > #37 PREEMPT Sun May 27 22:36:22 JST 2012 CPU: ARM926EJ-S [41069265]
    > revision 5 (ARMv5TEJ), cr=00093177 CPU: VIVT data cache, VIVT
    > instruction cache Machine: ARM-Versatile PB ... eth0: link up
    > IP-Config: Complete: device=eth0, addr=192.168.7.3,
    > mask=255.255.255.0, gw=192.168.7.1 host=192.168.7.3, domain=,
    > nis-domain=(none) bootserver=255.255.255.255,
    > rootserver=255.255.255.255, rootpath= input: AT Raw Set 2 keyboard as
    > /devices/fpga:06/serio0/input/input0 md: Skipping autodetection of
    > RAID arrays. (raid=autodetect will force) VFS: Cannot open root
    > device "0x0800" or unknown-block(8,0): error -6 Please append a
    > correct "root=" boot option; here are the available partitions:
    > Kernel panic - not syncing: VFS: Unable to mount root fs on
    > unknown-block(8,0) [<c0013870>] (unwind_backtrace+0x0/0xec) from
    > [<c0389b68>] (dump_stack+0x20/0x24) [<c0389b68>]
    > (dump_stack+0x20/0x24) from [<c0389bf4>] (panic+0x88/0x1c4)
    > [<c0389bf4>] (panic+0x88/0x1c4) from [<c04fbde8>]
    > (mount_block_root+0x240/0x290) [<c04fbde8>]
    > (mount_block_root+0x240/0x290) from [<c04fbf80>]
    > (mount_root+0x50/0x68) [<c04fbf80>] (mount_root+0x50/0x68) from
    > [<c04fc108>] (prepare_namespace+0x170/0x1d0) [<c04fc108>]
    > (prepare_namespace+0x170/0x1d0) from [<c04fba08>]
    > (kernel_init+0x1bc/0x204) [<c04fba08>] (kernel_init+0x1bc/0x204) from
    > [<c000e7dc>] (kernel_thread_exit+0x0/0x8)
    >
    >
    >
    >


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