From 2cb625478f8cea0f72b565007a35e1eb7882ac3a Mon Sep 17 00:00:00 2001
From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Thu, 6 Nov 2014 22:20:18 +0800
Subject: genirq: Add IRQ_SET_MASK_OK_DONE to support stacked irqchip

Add IRQ_SET_MASK_OK_DONE in addition to IRQ_SET_MASK_OK and
IRQ_SET_MASK_OK_NOCOPY to support stacked irqchip. IRQ_SET_MASK_OK_DONE
is the same as IRQ_SET_MASK_OK to irq core. To stacked irqchip, it means
that ascendant irqchips have done all the work and no more handling
needed in descendant irqchips.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/irq.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'include/linux/irq.h')

diff --git a/include/linux/irq.h b/include/linux/irq.h
index d58e58935465..566b1e541323 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -114,10 +114,14 @@ enum {
  *
  * IRQ_SET_MASK_OK	- OK, core updates irq_data.affinity
  * IRQ_SET_MASK_NOCPY	- OK, chip did update irq_data.affinity
+ * IRQ_SET_MASK_OK_DONE	- Same as IRQ_SET_MASK_OK for core. Special code to
+ *			  support stacked irqchips, which indicates skipping
+ *			  all descendent irqchips.
  */
 enum {
 	IRQ_SET_MASK_OK = 0,
 	IRQ_SET_MASK_OK_NOCOPY,
+	IRQ_SET_MASK_OK_DONE,
 };
 
 struct msi_desc;
-- 
cgit v1.2.3-70-g09d2