linux-kernel - Re: [PATCH v2] Remove deprecated IRQF

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Message-ID: <20150306183137.GZ13520@atomide.com>
Date:	Fri, 6 Mar 2015 10:31:38 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Valentin Rothberg <valentinrothberg@...il.com>
Cc:	akpm@...ux-foundation.org, Jonathan Corbet <corbet@....net>,
	Ralf Baechle <ralf@...ux-mips.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Paul Bolle <pebolle@...cali.nl>, Jiri Kosina <jkosina@...e.cz>,
	Hannes Reinecke <hare@...e.de>, Ewan Milne <emilne@...hat.com>,
	Christoph Hellwig <hch@....de>,
	Hongliang Tao <taohl@...ote.com>,
	Huacai Chen <chenhc@...ote.com>, Nishanth Menon <nm@...com>,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Rajendra Nayak <rnayak@...com>, Afzal Mohammed <afzal@...com>,
	Keerthy <j-keerthy@...com>, Sricharan R <r.sricharan@...com>,
	Zhou Wang <wangzhou1@...ilicon.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Felipe Balbi <balbi@...com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Quentin Lambert <lambert.quentin@...il.com>,
	Arnd Bergmann <arnd@...db.de>, Ingo Molnar <mingo@...nel.org>,
	Eyal Perry <eyalpe@...lanox.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mips@...ux-mips.org, iss_storagedev@...com,
	linux-mtd@...ts.infradead.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v2] Remove deprecated IRQF_DISABLED flag entirely

* Valentin Rothberg <valentinrothberg@...il.com> [150305 06:24]:
> The IRQF_DISABLED is a NOOP and has been scheduled for removal since
> Linux v2.6.36 by commit 6932bf37bed4 ("genirq: Remove IRQF_DISABLED from
> core code").
> 
> According to commit e58aa3d2d0cc ("genirq: Run irq handlers with
> interrupts disabled") running IRQ handlers with interrupts enabled can
> cause stack overflows when the interrupt line of the issuing device is
> still active.
> 
> This patch ends the grace period for IRQF_DISABLED (i.e., SA_INTERRUPT
> in older versions of Linux) and removes the definition and all remaining
> usages of this flag.
> 
> Signed-off-by: Valentin Rothberg <valentinrothberg@...il.com>

Acked-by: Tony Lindgren <tony@...mide.com>
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