linux-kernel - [PATCH 1/6] irqdomain: add new IRQ_DOMAIN_FLAGS

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Message-ID: <1443019758-20620-2-git-send-email-qais.yousef@imgtec.com>
Date:	Wed, 23 Sep 2015 15:49:13 +0100
From:	Qais Yousef <qais.yousef@...tec.com>
To:	<linux-kernel@...r.kernel.org>, <tglx@...utronix.de>
CC:	<marc.zyngier@....com>, <jason@...edaemon.net>,
	<jiang.liu@...ux.intel.com>, <linux-mips@...ux-mips.org>,
	Qais Yousef <qais.yousef@...tec.com>
Subject: [PATCH 1/6] irqdomain: add new IRQ_DOMAIN_FLAGS_IPI

This flag will be used to identify an IPI domain.

The idea is to reuse the alloc functions to allocate an IPI if it's set.

We could alternatively add a separate new alloc_ipi() function to struct
domain_ops.

Signed-off-by: Qais Yousef <qais.yousef@...tec.com>
---
 include/linux/irqdomain.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index d3ca79236fb0..9b3dc6c2a3cc 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -153,6 +153,9 @@ enum {
 	/* Core calls alloc/free recursive through the domain hierarchy. */
 	IRQ_DOMAIN_FLAG_AUTO_RECURSIVE	= (1 << 1),
 
+	/* Irq domain is an IPI domain */
+	IRQ_DOMAIN_FLAG_IPI		= (1 << 2),
+
 	/*
 	 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
 	 * for implementation specific purposes and ignored by the
@@ -326,6 +329,11 @@ static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
 {
 	return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY;
 }
+
+static inline bool irq_domain_is_ipi(struct irq_domain *domain)
+{
+	return domain->flags & IRQ_DOMAIN_FLAG_IPI;
+}
 #else	/* CONFIG_IRQ_DOMAIN_HIERARCHY */
 static inline void irq_domain_activate_irq(struct irq_data *data) { }
 static inline void irq_domain_deactivate_irq(struct irq_data *data) { }
@@ -339,6 +347,11 @@ static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
 {
 	return false;
 }
+
+static inline bool irq_domain_is_ipi(struct irq_domain *domain)
+{
+	return false;
+}
 #endif	/* CONFIG_IRQ_DOMAIN_HIERARCHY */
 
 #else /* CONFIG_IRQ_DOMAIN */
-- 
2.1.0

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