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Message-ID: <1331314389.18960.1.camel@twins>
Subject: RE: [PATCH 1/2] watchdog, hpwdt: Remove priority option for NMI
 callback
From: Peter Zijlstra <peterz@infradead.org>
To: "Mingarelli, Thomas" <Thomas.Mingarelli@hp.com>
Cc: Don Zickus <dzickus@redhat.com>, "x86@kernel.org" <x86@kernel.org>,
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Date: Fri, 09 Mar 2012 18:33:09 +0100
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On Fri, 2012-03-09 at 17:28 +0000, Mingarelli, Thomas wrote:
> Can I register for more than one type? Like NMI_UNKNOWN | NMI_DIE (or
> something like that)?

There's only NMI_LOCAL and NMI_UNKNOWN, and you can only use NMI_LOCAL
if you can tell you generated the NMI. See it as one massively shared
interrupt line.

The NMI_UNKNOWN handler is basically the handler of last resort for
those that cannot multiplex the line, hence the restriction of only
having one.