From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 10 Feb 2011 14:14:20 +0000 (+0100)
Subject: genirq: Add preflow handler support
X-Git-Tag: v2.6.39-rc1~503^2~9^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=781295762defc709a609efc01d8bb065276cd9a2;p=pandora-kernel.git

genirq: Add preflow handler support

sparc64 needs to call a preflow handler on certain interrupts befor
calling the action chain. Integrate it into handle_fasteoi_irq. Must
be enabled via CONFIG_IRQ_FASTEOI_PREFLOW. No impact when disabled.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David S. Miller <davem@davemloft.net>
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