Message-ID: <492AFBCD.2020009@s5r6.in-berlin.de>
Date: Mon, 24 Nov 2008 20:09:01 +0100
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
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To: Jay Fenlason <fenlason@redhat.com>
CC: linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: idr: IDs guaranteed to be less than 1<<31? (was Re: [PATCH] firewire:
 us an idr rather than a linked list for resources)
References: <20081124163728.GA5826@redhat.com>
In-Reply-To: <20081124163728.GA5826@redhat.com>
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Jay Fenlason wrote at linux1394-devel:
> As mentioned in the comments, there is a theoretical problem with this
> code if someone manages to allocate 2^31 resources on a 32-bit
> machine, or 2^32+1 resources on a 64+-bit machine.

The kerneldoc of idr_get_new() says that we only get IDs in the range of
0...0x7fffffff.  But is this true with 64bit kernels?
-- 
Stefan Richter
-=====-==--- =-== ==---
http://arcgraph.de/sr/
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