I got this message during
compiling module.


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Building modules, stage 2.

MODPOST

WARNING: "tasklist_lock" [ /Red/src/Red.ko]
undefined!

make[1]: Leaving directory
`/usr/src/linux-headers-2.6.18-4-686'





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Actually, Red.ko had made
but can not load the module due to the unknown symbol (tasklist_lock).


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What’s the problem?? I can see the
symbol is exported in the linux-header-2.6.18-4-686/include/linux/sched.h.


I couldn’t understand why it is shown “undefined�??


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Also during searching about
this problem, I read this - for linux kernel 2.6.18, the symbol does NOT export
any more …. Is this right???


If it is, is there any way
to use the symbol ‘tasklist_lock’?


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There is my only guess, it
is needed the license to use this symbol.


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Thanks a lot for any
suggestion.