From: alan@lxorguk.ukuu.org.uk (Alan Cox)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Why exported const value modified by another driver not updated in original driver
Date: Tue, 4 Sep 2012 11:46:18 +0100 [thread overview]
Message-ID: <20120904114618.62a1d89e@pyramind.ukuu.org.uk> (raw)
In-Reply-To: <CAJKgH8Ah-aq=LfOWs2SBZnndzugNGxJbqYS11YVQLXJy6FZxkw@mail.gmail.com>
On Tue, 4 Sep 2012 15:00:16 +0530
Manavendra Nath Manav <mnm.kernel@gmail.com> wrote:
> Hi,
>
> I have declared a static const int variable in one driver and exported
> that variable symbol. In another driver i am modifying that variable.
> The other driver prints the modified value but the original driver
> retains the original value. When both virtual and physical addresses
> of the variable as seen by both drivers are same, how is this even
> possible. Is it a kernel bug?
It's const, why is it even a surprise. If you don't understand what is
going on then I suggest you disassemble the code. That will I think let
you understand what is going on.
Alan
next prev parent reply other threads:[~2012-09-04 10:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 9:30 Why exported const value modified by another driver not updated in original driver Manavendra Nath Manav
2012-09-04 10:28 ` Manavendra Nath Manav
[not found] ` <20120904103905.GA21953@jak-linux.org>
2012-09-04 10:59 ` Manavendra Nath Manav
[not found] ` <20120904122544.GC19396@mwanda>
2012-09-05 8:27 ` Manavendra Nath Manav
2012-09-04 10:46 ` Alan Cox [this message]
2012-09-04 12:06 ` Bernd Petrovitsch
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