From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:52901 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755949AbcIVPmI (ORCPT ); Thu, 22 Sep 2016 11:42:08 -0400 Subject: Patch "genirq: Provide irq_gc_{lock_irqsave,unlock_irqrestore}() helpers" has been added to the 4.4-stable tree To: boris.brezillon@free-electrons.com, alexandre.belloni@free-electrons.com, gregkh@linuxfoundation.org, jason@lakedaemon.net, marc.zyngier@arm.com, nicolas.ferre@atmel.com, tglx@linutronix.de Cc: , From: Date: Thu, 22 Sep 2016 17:41:54 +0200 Message-ID: <147455891422317@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled genirq: Provide irq_gc_{lock_irqsave,unlock_irqrestore}() helpers to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: genirq-provide-irq_gc_-lock_irqsave-unlock_irqrestore-helpers.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From ebf9ff753c041b296241990aef76163bbb2cc9c8 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Tue, 13 Sep 2016 15:58:28 +0200 Subject: genirq: Provide irq_gc_{lock_irqsave,unlock_irqrestore}() helpers From: Boris Brezillon commit ebf9ff753c041b296241990aef76163bbb2cc9c8 upstream. Some irqchip drivers need to take the generic chip lock outside of the irq context. Provide the irq_gc_{lock_irqsave,unlock_irqrestore}() helpers to allow one to disable irqs while entering a critical section protected by gc->lock. Note that we do not provide optimized version of these helpers for !SMP, because they are not called from the hot-path. [ tglx: Added a comment when these helpers should be [not] used ] Signed-off-by: Boris Brezillon Cc: Jason Cooper Cc: Marc Zyngier Cc: Nicolas Ferre Cc: Alexandre Belloni Link: http://lkml.kernel.org/r/1473775109-4192-1-git-send-email-boris.brezillon@free-electrons.com Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- include/linux/irq.h | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -916,6 +916,16 @@ static inline void irq_gc_lock(struct ir static inline void irq_gc_unlock(struct irq_chip_generic *gc) { } #endif +/* + * The irqsave variants are for usage in non interrupt code. Do not use + * them in irq_chip callbacks. Use irq_gc_lock() instead. + */ +#define irq_gc_lock_irqsave(gc, flags) \ + raw_spin_lock_irqsave(&(gc)->lock, flags) + +#define irq_gc_unlock_irqrestore(gc, flags) \ + raw_spin_unlock_irqrestore(&(gc)->lock, flags) + static inline void irq_reg_writel(struct irq_chip_generic *gc, u32 val, int reg_offset) { Patches currently in stable-queue which might be from boris.brezillon@free-electrons.com are queue-4.4/irqchip-atmel-aic-fix-potential-deadlock-in-xlate.patch queue-4.4/drm-atmel-hlcdc-fix-vertical-scaling.patch queue-4.4/genirq-provide-irq_gc_-lock_irqsave-unlock_irqrestore-helpers.patch