Re: use of EXPORT_SYMBOL()

[Fawad Lateef <fawadlateef@xxxxxxxxx>]

On 12/5/05, Sabyasachi Pradhan <spradhan@xxxxxxxxxxxxx> wrote:
>
>     To compile the kernel properly I had to make a change to the Makefile
> in linux/fs/ to add a new entry super.o to extern-obj's. I was checking
> the exported symbols in my kernel use /proc/ksyms and just wanted to know
> what the string appearing before the symbol signify, is it the address in
> memory ? Can I use the exported synbol directly in my program or do I have
> to make any more changes ? Thanks.
>

I don't think (and also I never need to) for exporting symbol changes
in Makefile is required. Are you getting some error or the symbol is
not exported after rebooting to the recompiled kernel ?

The hex string before symbol in ksyms is actually the memory address
(virtual) of where it is located and the string after symbol name like
_Rxxxxx is the version related to that symbol for the running compiled
kernel (and I saw this _Rxxxxx different on different machines having
the same kernel with same configuration options) (CMIIW)

If your symbol exists/exported in ksyms (with any other string
appended to it)  then you can access it directly in you module, might
need to redefine is with extern for removing compilation warning !

--
Fawad Lateef

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