Subject: Re: [PATCH] kill symbol_get & friends
From: David Woodhouse <dwmw2@redhat.com>
To: Dave Airlie <airlied@gmail.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>, Christoph Hellwig <hch@lst.de>,
       Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
       adaplas@pol.net,
       lkml - Kernel Mailing List <linux-kernel@vger.kernel.org>
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Organization: Red Hat UK Ltd.
Date: Thu, 13 Jan 2005 08:42:59 +0000
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On Thu, 2005-01-13 at 11:59 +1100, Dave Airlie wrote:
> what weak symbol support? can I actually use gcc weak symbols and have
> it all work?

Weak undefined symbols used to work, certainly. The MTD code used them
for a while, before kaos imposed the inter_module_crap on it despite my
objections.

> what happens if the module goes away? 

If another module is using a weak symbol, IIRC the module providing the
symbol _can't_ go away. I could be wrong -- I didn't use that
functionality. I was using get_symbol() and I added put_symbol() so I
could explicitly refcount it. 

-- 
dwmw2


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