linux-kernel - Re: [Cocci] [RFC] Convert "resource->end - resource->start + 1" to resource

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Date:	Mon, 06 Jun 2011 22:32:18 -0700
From:	Joe Perches <joe@...ches.com>
To:	Julia Lawall <julia@...u.dk>
Cc:	H Hartley Sweeten <hartleys@...ionengravers.com>,
	cocci <cocci@...u.dk>, vinod.koul@...el.com,
	dan.j.williams@...el.com,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [Cocci] [RFC] Convert "resource->end - resource->start + 1" to
 resource_size(resource) via coccinelle

On Tue, 2011-06-07 at 07:07 +0200, Julia Lawall wrote:
> On Mon, 6 Jun 2011, Joe Perches wrote:
> > Perhaps do a treewide update via:
> > $ cat resource.cocci
> > @@
> > struct resource *ptr;
> > @@
> > - ptr->end - ptr->start + 1
> > + resource_size(ptr)
> > $ spatch -sp_file resource.cocci linux-2.6/
> There might be some cases that have the +1 in a different place, or that 
> have some parentheses.
> I suspect that a lot of these non-uses of resource_size still exist.

True enough.

Cocci already handles the parens case
"(foo->end-foo->start)+1"

There are some uses of end+1-start and
1+end-start that weren't converted by
the patch I sent.


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