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Date: Sat, 15 Sep 2007 00:44:21 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Chuck Ebbert <cebbert@redhat.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       David Brownell <david-b@pacbell.net>
Subject: Re: Two identical entries for "rtc" in /proc/devices
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On Thu, 06 Sep 2007 18:23:22 -0400 Chuck Ebbert <cebbert@redhat.com> wrote:

> # ls -li
> total 0
> 4026532007 -r--r--r-- 1 root root 0 Sep  6 18:18 nvram
> 4026532067 -r--r--r-- 1 root root 0 Sep  6 18:18 rtc
> 4026532067 -r--r--r-- 1 root root 0 Sep  6 18:18 rtc
> 4026532056 -rw-r--r-- 1 root root 0 Sep  6 18:18 snd-page-alloc

Next -mm has

procfs-detect-duplicate-names.patch
procfs-detect-duplicate-names-fix.patch
procfs-detect-duplicate-names-fix-fix-2.patch

which will at least tell us who the second offender is.

I have a vague memory that this is due to selecting two different types of
rtc in config.  Perhaps a Kconfig fix is needed, dunno.