linux-kernel - Re: Why exported const value modified by another driver not updated in original driver

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Message-ID: <20120904122544.GC19396@mwanda>
Date:	Tue, 4 Sep 2012 05:25:44 -0700
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Manavendra Nath Manav <mnm.kernel@...il.com>
Cc:	kernelnewbies@...nelnewbies.org, devel@...verdev.osuosl.org,
	Greg KH <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Why exported const value modified by another driver not updated
 in original driver

On Tue, Sep 04, 2012 at 03:58:20PM +0530, Manavendra Nath Manav wrote:
> Is the above a genuine kernel bug, or i am missing something out here. Pls help.
> 

When you declare something as const then the compiler assumes it
really is const and uses a literal instead of reading from memory.
I'm surprised the compiler doesn't print a warning message.

It has to do with compilers, nothing to do with kernels.

regards,
dan carpenter
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