linux-kernel - Re: [PATCH 6/7] Ksplice: Export symbols needed for Ksplice

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Message-Id: <200902161741.34134.rusty@rustcorp.com.au>
Date:	Mon, 16 Feb 2009 17:41:33 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Tim Abbott <tabbott@....edu>
Cc:	Jeff Arnold <jbarnold@....edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Anders Kaseorg <andersk@....edu>,
	Waseem Daher <wdaher@....edu>,
	Nikanth Karthikesan <knikanth@...e.de>
Subject: Re: [PATCH 6/7] Ksplice: Export symbols needed for Ksplice

On Friday 13 February 2009 12:16:40 Tim Abbott wrote:
> On Wed, 4 Feb 2009, Rusty Russell wrote:
> 
> > On Saturday 06 December 2008 10:33:59 Jeff Arnold wrote:
> > > From: Tim Abbott <tabbott@....edu>
> > > 
> > > Ksplice uses several functions from module.c in order to resolve
> > > symbols and implement dependency handling.  Calling these functions
> > > requires holding module_mutex, so it is exported.
> > 
> > I have fought every attempt to export that.  It was long a cause of misery
> > and pain; people saw the lock and so started grabbing it.
> > 
> > Any chance we can find another way?
> 
> It is definitely possible, but it wouldn't be pretty.  There are a few 
> things that we use module_mutex for:

Yes, having looked through the code I don't think the export can be avoided.

Thanks,
Rusty.
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