linux-kernel - Re: [PATCH] flex_array: add helpers to get and put to make pointers easy to use

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Message-ID: <alpine.DEB.2.00.1008031540510.25322@chino.kir.corp.google.com>
Date:	Tue, 3 Aug 2010 15:43:41 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Eric Paris <eparis@...hat.com>
cc:	linux-kernel@...r.kernel.org, selinux@...ho.nsa.gov,
	dave@...ux.vnet.ibm.com, Andrew Morton <akpm@...ux-foundation.org>,
	jmorris@...ei.org, sds@...ho.nsa.gov
Subject: Re: [PATCH] flex_array: add helpers to get and put to make pointers
 easy to use

On Tue, 3 Aug 2010, Eric Paris wrote:

> > > Getting and putting arrays of pointers with flex arrays is a PITA.  You
> > > have to remember to pass &ptr to the _put and you have to do weird and
> > > wacky casting to get the ptr back from the _get.  Add two functions
> > > flex_array_get_ptr() and flex_array_put_ptr() to handle all of the magic.
> > > 
> > 
> > There's no code currently in the tree that uses the flex array interface, 
> > so is this something that you've encountered in practice or only by 
> > inspection?  If it's the former, is that code on its way for 2.6.36?
> 
> I did decide to use flex_arrays on code intended for .36
> http://git.kernel.org/?p=linux/kernel/git/jmorris/security-testing-2.6.git;a=commitdiff;h=6371dcd36f649d9d07823f31400618155a20dde1
> 

Great, a user!  I'm hoping that more people will adopt this interface but 
I can't think of anything that could currently be converted.  Maybe we can 
find opportunities in patches as they're proposed to the list.

Thanks.
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