On Sat, Mar 28, 2009 at 5:04 PM, nidhi mittal <[email protected]> wrote:
> hi all
> i compiled one of my kernel module
> but the error i got is completely cryptic -- pl see -- whethr my kernel is
> corrupted or what
> o/p of make is
>
> make[1] Entering directory /usr/src/linux---
> Building modules , stage 1
> MODPOST 1 modules
> WARNING "_fixunsdfsi" [/home/nidhi/<module_dir>/<module_name>.ko] undefined
> WARNING "_adddf3" [/home/nidhi/<module_dir>/<module_name>.ko] undefined
> WARNING "_floatunsidf" [/home/nidhi/<module_dir>/<module_name>.ko] undefined
> make[1] Leaving directory /usr/src/linux-headers-2.6.27-generic
>
>
> but what i found is i get a module.ko file
>
You should, because the linking of undefined symbol is done at the
time of insmod and not the creation of kernel module.
> and when i insmod it
> o/p
> insmod: error inserting 'blkdev.ko': -1 Unknown symbol in module
>
Do a dmesg and you will see that there is a message about the unknown symbol.
See the message and figure out why that symbol is not present.
Either it will be a spelling mistake or the symbol is not exported
from the kernel.
So, if the case is the later on do a EXPORT_SYMBOL(name of symbol) in
the C file.
HTH,
> pl help
> Nidhi
>
>
> --
> Thanks & Regards
> Nidhi
--
Regards,
Sandeep.
“To learn is to change. Education is a process that changes the learner.”
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