linux-kernel - [tip:x86/apic] genirq: Enhance irq_data_to

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Date:	Tue, 16 Jun 2015 01:16:25 -0700
From:	tip-bot for Jiang Liu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	bp@...en8.de, bhelgaas@...gle.com, hpa@...or.com,
	linux-kernel@...r.kernel.org, mingo@...nel.org,
	konrad.wilk@...cle.com, benh@...nel.crashing.org,
	tony.luck@...el.com, tglx@...utronix.de, jiang.liu@...ux.intel.com,
	yinghai@...nel.org, rdunlap@...radead.org, marc.zyngier@....com
Subject: [tip:x86/apic] genirq: Enhance irq_data_to_desc()
  to support hierarchy irqdomain

Commit-ID:  c7cfc94096db28d3072b402c224eb50349926e24
Gitweb:     http://git.kernel.org/tip/c7cfc94096db28d3072b402c224eb50349926e24
Author:     Jiang Liu <jiang.liu@...ux.intel.com>
AuthorDate: Mon, 1 Jun 2015 16:05:10 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 16 Jun 2015 10:10:16 +0200

genirq: Enhance irq_data_to_desc() to support hierarchy irqdomain

For irq associated with hierarchy irqdomains, there will be multiple
irq_datas for one irq_desc. So enhance irq_data_to_desc() to support
hierarchy irqdomain. Also export irq_data_to_desc() as an inline
function for later reuse.

Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Marc Zyngier <marc.zyngier@....com>
Link: http://lkml.kernel.org/r/1433145945-789-2-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 include/linux/irqdesc.h | 9 +++++++++
 kernel/irq/internals.h  | 2 --
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index dd1109f..a113a8d 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -93,6 +93,15 @@ struct irq_desc {
 extern struct irq_desc irq_desc[NR_IRQS];
 #endif
 
+static inline struct irq_desc *irq_data_to_desc(struct irq_data *data)
+{
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+	return irq_to_desc(data->irq);
+#else
+	return container_of(data, struct irq_desc, irq_data);
+#endif
+}
+
 static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc)
 {
 	return &desc->irq_data;
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index df553b0..b93d434 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -59,8 +59,6 @@ enum {
 #include "debug.h"
 #include "settings.h"
 
-#define irq_data_to_desc(data)	container_of(data, struct irq_desc, irq_data)
-
 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
 		unsigned long flags);
 extern void __disable_irq(struct irq_desc *desc, unsigned int irq);
--
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