Kernel panic - not syncing: loopback: Failed to register netdevice: -17

[Altera_Forum]

Hi ,  

 I flashed kernel image to cfi flash using  nios2-flash-programmer Stratix IV   then nios2-terminal , but kernel panics here,   Stratix IV GX FPGA Development Kit User Guide linux/nios ii-mmu init_bootmem_node(?,0x105a2, 0x10000, 0x18000) free_bootmem(0x105a2000, 0x7a5e000) reserve_bootmem(0x105a2000, 0x1000) built 1 zonelists in zone order, mobility grouping on. total pages: 32512 kernel command line: pid hash table entries: 512 (order: -1, 2048 bytes) dentry cache hash table entries: 16384 (order: 4, 65536 bytes) inode-cache hash table entries: 8192 (order: 3, 32768 bytes) we have 98304 pages of ram memory available: 124140k/5767k ram, 0k/0k rom (2077k kernel code, 3690k data) hierarchical rcu implementation. nr_irqs:32 calibrating delay loop... 74.75 bogomips (lpj=373760) mount-cache hash table entries: 512 net: registered protocol family 16 init_bsp(): registering device resources bio: create slab <bio-0> at 0 ------------[ cut here ]------------ warning: at /opt/dipen/nios2-linux/linux_source/linux-2.6/fs/sysfs/dir.c:451 sys fs_add_one+0xb0/0xe0() sysfs: cannot create duplicate filename '/class/net/lo/statistics/' modules linked in: stack from d7c16d94:   d7c16dd8 d0012548 ffffffef d7c1e000 d7c5fd74 d0588db4 d00125cc d0555b18  d7c16dc0 00000001 d00c04f0 d7c1e000 d7c5fd74 fffffff4 d05890b4 0000000e  d0151a9c d0588f3c d7c4cdfc d0588d80 00000000 00000001 d0152330 00000000   d01342e4 d7c16e64 d7c4ce04 00000000 00000000 d0588dc0 d7c4cc00 d7c4cdfc  call trace:   [<d0197cf0>] [<d0188944>] [<d0188b3c>] [<d01830fc>]   [<d01830fc>] [<d01832e8>] [<d018338c>] [<d0000210>]   [<d00b0000>] [<d0002294>] [<d000e250>] [<d00021f8>]   [<d0001074>] [<d0002288>]  ---[ end trace 4eaa2a86a8e2da22 ]--- kernel panic - not syncing: loopback: failed to register netdevice: -17   any one have idea about this ?