in order for a module to use ANY OF THE symbol from another module, or
from the core kernel itself, the symbol must be declared as
EXPORT_SYMBOL in the first place. And then the symbol user side must
declare "extern" for the symbol before using it.
On Thu, Feb 26, 2009 at 10:32 PM, Sabin <linuxguru75@xxxxxxxxx> wrote:
> Thanks Matthias,
> It worked! That was stupidly simple. But that still leaves the actual
> question - why am I not able to use a symbol exported by kernel. Is
> there anything to be done before using an exported symbol?
>
> Thank you
> Sabin
>
> On Thu, 2009-02-26 at 09:50 +0100, Matthias Kaehlcke wrote:
>> El Thu, Feb 26, 2009 at 02:02:18PM +0000 Sabin ha dit:
>>
>> > I am not able to link with proc_root symbol, though i could see it
>> > exported in /proc/kallsyms.
>> > I am trying something like this:
>> > static void __exit procfs_exit(void)
>> > {
>> > remove_proc_entry(PROCFS_NAME,&proc_root);
>> > printk(KERN_INFO "/proc/%s removed\n",PROCFS_NAME);
>> > }
>> >
>> > have included the following:
>> > #include <linux/module.h>
>> > #include <linux/kernel.h>
>> > #include <linux/proc_fs.h>
>>
>> to remove an entry in the root of /proc do:
>>
>> remove_proc_entry(PROCFS_NAME, NULL);
>>
>
>
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>
--
Regards,
Peter Teoh
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