最近自己在做内核以及根文件系统的移植，用的开发板是TI的dm6467.可是在将内核和根文件系统通过uboot烧写到开发板中时，boot开发板。
之后就出现下面这样的错误了：
Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
empty_blocks 1536, bad_blocks 0, c->nr_blocks 3520
VFS: Cannot open root device "mtdblock3" or unknown-block(31,3)
Please append a correct "root=" boot option; here are the available partitions:
1f00 128 mtdblock0 (driver?)
1f01 1280 mtdblock1 (driver?)
1f02 4096 mtdblock2 (driver?)
1f03 56320 mtdblock3 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,3)
Backtrace:
[<c002e6d0>] (dump_backtrace+0x0/0x110) from [<c002e814>] (dump_stack+0x18/0x1c)
r6:c0026808 r5:c6011006 r4:c03f32f0
[<c002e7fc>] (dump_stack+0x0/0x1c) from [<c0040164>] (panic+0x54/0x124)
[<c0040110>] (panic+0x0/0x124) from [<c0008fc4>] (mount_block_root+0x1d4/0x214)
r3:00000001 r2:c6024000 r1:c6025f58 r0:c0370cc4
[<c0008df0>] (mount_block_root+0x0/0x214) from [<c00090c8>] (mount_root+0xc4/0xf
c)
[<c0009004>] (mount_root+0x0/0xfc) from [<c0009268>] (prepare_namespace+0x168/0x
1c0)
r5:c0026808 r4:c03f2de0
[<c0009100>] (prepare_namespace+0x0/0x1c0) from [<c00087c8>] (kernel_init+0xdc/0
x110)
r5:c0025518 r4:c03f2ba0
[<c00086ec>] (kernel_init+0x0/0x110) from [<c0043240>] (do_exit+0x0/0x654)
r5:00000000 r4:00000000
刚刚接触这块不久，还请各位帮帮忙看看，指导指导。谢谢！
