schedule problem

hi all,

i write a kernel module, when i insmod it,

the following is output:

bad: scheduling while atomic!

Stack from 081dff8c:<0>

<0> ffffe000<0> 08189464<0> 081b0e94<0> 02625a00<0> 00000000<0> 00000000<0> 00000000<0> 00000000<0>

<0> 00000000<0> 00000000<0> 00000000<0> 00000000<0> 08fc0428<0> 00000000<0> 00000001<0> 00000002<0>

<0> 08fc04d8<0> ffffe000<0> 00000000<0> 0800305c<0> 0800307c<0> 080001a0<0> 081fc4e0<0> 081e0790<0>

<0> 081e0298<0> 081f45bc<0> 08800000<0> 08006860<0> 08000100<0>

Call Trace:<0>

where it may be wrong? and how can i trace the kernel routine?

in x86 platform, i can use kgdb to debug it, now in nios2, how should i do?

thanks for your help.