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From: David Brownell <david-b@pacbell.net>
To: Andrew Morton <akpm@osdl.org>, David Howells <dhowells@redhat.com>
Subject: Re: [PATCH 3/3] IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Date: Mon, 2 Oct 2006 13:46:11 -0700
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Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
       torvalds@osdl.org, linux-kernel@vger.kernel.org,
       linux-arch@vger.kernel.org, Dmitry Torokhov <dtor@mail.ru>,
       Greg KH <greg@kroah.com>, Alan Stern <stern@rowland.harvard.edu>
References: <20061002162049.17763.39576.stgit@warthog.cambridge.redhat.com> <20061002162053.17763.26032.stgit@warthog.cambridge.redhat.com> <20061002132116.2663d7a3.akpm@osdl.org>
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The only downside I can think of for dropping pt_regs is that now it's harder
to just find the IRQ handler in a driver ... it's previously been all but
guaranteed that the _only_ use of that type is the IRQ logic.  The upsides
surely outweigh that.

> >  (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
> >      something different depending on whether it's been supplied with a regs
> >      pointer or not.

gaak!  where did that come from?  I'll be surprised if removing
that causes any problem at all.

- Dave

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