linux-kernel - [RFC Part1 v1 07/18] x86, irq: Introduce helpers to access struct irq

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Date:	Thu, 11 Sep 2014 16:24:54 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Grant Likely <grant.likely@...aro.org>
Cc:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Joerg Roedel <joro@...tes.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: [RFC Part1 v1 07/18] x86, irq: Introduce helpers to access struct irq_cfg

Change irq_cfg() from static to extern, also introduce helper function
irqd_cfg(). Later we could rewrite these two helpers when enabling
hierarchy irqdomain.

Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
---
 arch/x86/include/asm/hw_irq.h  |    2 ++
 arch/x86/kernel/apic/io_apic.c |    7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 18e8717bf644..f457fcd0f3ba 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -132,6 +132,8 @@ struct irq_cfg {
 	};
 };
 
+extern struct irq_cfg *irq_cfg(unsigned int irq);
+extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
 extern void setup_vector_irq(int cpu);
 extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
 extern void send_cleanup_vector(struct irq_cfg *);
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index ee3d3ff521a3..9b048c239dd4 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -281,11 +281,16 @@ int __init arch_early_irq_init(void)
 	return 0;
 }
 
-static inline struct irq_cfg *irq_cfg(unsigned int irq)
+struct irq_cfg *irq_cfg(unsigned int irq)
 {
 	return irq_get_chip_data(irq);
 }
 
+struct irq_cfg *irqd_cfg(struct irq_data *irq_data)
+{
+	return irq_data->chip_data;
+}
+
 static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node)
 {
 	struct irq_cfg *cfg;
-- 
1.7.10.4

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