compiler error in simple module

[Hanumant Singh]

Thanks

On Mon, Jan 10, 2011 at 10:16 PM, Rajat Sharma <fs.rajat at gmail.com> wrote:

> Hi,
>
> yes you are missing a very vital thing and that is EXPORT_SYMBOL.
> Loadable Kernel modules are not part of kernel image and can not just
> use any symbol of kernel, They can use only exported symbols either
> exported through EXPORT_SYMBOL or EXPORT_SYMBOL_GPL. GPL version has
> limitation that your module license should be GPL too and you have to
> make it open source.
>
> Anyways you can always write a similar function in your module:
>
>        task_lock(tsk);
>        strncpy(buf, tsk->comm, sizeof(tsk->comm));
>        task_unlock(tsk);
>
> Note that task_lock is an static inline function in sched.h so you can
> safely use that.
>
> Rajat
>
> On Tue, Jan 11, 2011 at 11:32 AM, Hanumant Singh <hanumant07 at gmail.com>
> wrote:
> > Hi
> >    I am trying to write a simple module that sort of emulates the ps
> > command. I am trying to get the comm string for the task, using
> > get_task_comm, but the make command keeps telling me that the symbol
> > get_task_comm is not defined. I have included linux/sched.h. This is the
> > header file, which I believe has the prototype definition for the
> function.
> > Am I missing something?
> > Thanks
> > Hanumant
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> >
> >
>
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