yaffs2文件系统移植出错

求助:
2.6.30.4+4.3.3+1.13.0,NAND 64M,使用mkyaffsimage_2,系统启动时出现:
md: ... autorun DONE.
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 604K
Warning: unable to open an initial console.
Failed to execute /linuxrc.  Attempting defaults...
Kernel panic - not syncing: No init found.  Try passing init= option to kernel.
但是用mkcramfs编译文件系统时,一切正常

内核是自己移植的？还是天嵌科技提供的？