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Jacinto 5 EVM issue: SD card can't boot the linux kernel

I am a engineer from Harman Automotive(China). I am debugging the Jacinto5 EVM board. Now we find a issue: we can't boot the linux kernel from a 8G TOSHIBA SD card. We used mksd-ti814x.sh tool and pre-build image in ezasdk package to generate the SD card partion and image. But the kernel can't boot. Below is the log. It seems that root fs is mounted ok but devtmpfs can’t mount proerly. Did you see this problem?

======================

## Booting kernel from Legacy Image at 82000000 ...

  Image Name:   Arago/2.6.37-psp04.01.00.06/dm81

  Image Type:   ARM Linux Kernel Image (uncompressed)

  Data Size:    2571364 Bytes = 2.5 MiB

  Load Address: 80008000

  Entry Point:  80008000

  Verifying Checksum ... OK

  Loading Kernel Image ... OK

OK

Starting kernel ...

……(omit this part of log)

Waiting for root device /dev/mmcblk0p2...

mmc0: new high speed SDHC card at address db08

mmcblk0: mmc0:db08 SD08G 7.42 GiB

mmcblk0: p1 p2

EXT3-fs: barriers not enabled

kjournald starting.  Commit interval 5 seconds

EXT3-fs (mmcblk0p2): using internal journal

EXT3-fs (mmcblk0p2): mounted filesystem with writeback data mode

VFS: Mounted root (ext3 filesystem) on device 179:2.

devtmpfs: error mounting -2

Freeing init memory: 200K

Kernel panic - not syncing: No init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.

Backtrace:

[<c0048b70>] (dump_backtrace+0x0/0x110) from [<c039dd84>] (dump_stack+0x18/0x1c)

r7:00000013 r6:c006e9bc r5:c0008670 r4:c0528dd0

[<c039dd6c>] (dump_stack+0x0/0x1c) from [<c039dde8>] (panic+0x60/0x17c)

[<c039dd88>] (panic+0x0/0x17c) from [<c003a574>] (init_post+0xa4/0xc4)

r3:cca93f00 r2:00000000 r1:c06f8260 r0:c04617ad

[<c003a4d0>] (init_post+0x0/0xc4) from [<c0008788>] (kernel_init+0x118/0x154)

r5:c0008670 r4:c0528640

[<c0008670>] (kernel_init+0x0/0x154) from [<c006e9bc>] (do_exit+0x0/0x5e4)

r5:c0008670 r4:00000000

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