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From: David Howells <dhowells@redhat.com>
In-Reply-To: <200512130130.05186.arnd@arndb.de> 
References: <200512130130.05186.arnd@arndb.de>  <dhowells1134431145@warthog.cambridge.redhat.com> 
To: Arnd Bergmann <arnd@arndb.de>
Cc: David Howells <dhowells@redhat.com>, torvalds@osdl.org, akpm@osdl.org,
       hch@infradead.org, arjan@infradead.org, matthew@wil.cx,
       linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation 
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Date: Tue, 13 Dec 2005 21:03:35 +0000
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Arnd Bergmann <arnd@arndb.de> wrote:

> I can't see how your code actually detects the over-upping, although it's 
> fairly obvious how it would be done. Did you miss one patch for this?

If owner is NULL, then you've probably upped twice.

David