From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.mail.elte.hu ([157.181.151.9]:25783 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1030288AbWJCKvj (ORCPT ); Tue, 3 Oct 2006 06:51:39 -0400 Date: Tue, 3 Oct 2006 12:43:16 +0200 From: Ingo Molnar Subject: Re: [PATCH 3/3] IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Message-ID: <20061003104316.GA6830@elte.hu> References: <20061002162049.17763.39576.stgit@warthog.cambridge.redhat.com> <20061002162053.17763.26032.stgit@warthog.cambridge.redhat.com> <20061002132116.2663d7a3.akpm@osdl.org> <20061002201836.GB31365@elte.hu> <20061002140121.f588b463.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061002140121.f588b463.akpm@osdl.org> Sender: linux-arch-owner@vger.kernel.org To: Andrew Morton Cc: Linus Torvalds , David Howells , Thomas Gleixner , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Dmitry Torokhov , Greg KH , David Brownell , Alan Stern List-ID: * Andrew Morton wrote: > > I don't personally mind the patch, I just wanted to bring that issue > > up. > > yup. Perhaps we could add > > #define IRQ_HANDLERS_DONT_USE_PTREGS > > so that out-of-tree drivers can reliably do their ifdefing. i'd suggest we do something like: #define __PT_REGS so that backportable drivers can do: static irqreturn_t irq_handler(int irq, void *dev_id __PT_REGS) instead of an #ifdef jungle. Older kernel bases can define __PT_REGS in their interrupt.h (or in the backported driver's header, in one place) #ifndef __PT_REGS # define __PT_REGS , struct pt_regs *regs #endif this would minimize the direct impact in the source-code. Ingo