linux-kernel - [tip:irq/core] genirq: Add an extra comment about the use of affinity in irq_common

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Message-ID: <tip-955bfe5912e7839abcc83694f06867535487404b@git.kernel.org>
Date:	Thu, 25 Feb 2016 02:01:35 -0800
From:	tip-bot for Qais Yousef <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-mips@...ux-mips.org, marc.zyngier@....com, hpa@...or.com,
	linux-kernel@...r.kernel.org, ralf@...ux-mips.org,
	jiang.liu@...ux.intel.com, jason@...edaemon.net,
	tglx@...utronix.de, qais.yousef@...tec.com,
	lisa.parratt@...tec.com, qsyousef@...il.com, mingo@...nel.org
Subject: [tip:irq/core] genirq: Add an extra comment about the use of
 affinity in irq_common_data

Commit-ID:  955bfe5912e7839abcc83694f06867535487404b
Gitweb:     http://git.kernel.org/tip/955bfe5912e7839abcc83694f06867535487404b
Author:     Qais Yousef <qais.yousef@...tec.com>
AuthorDate: Tue, 8 Dec 2015 13:20:17 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 25 Feb 2016 10:56:55 +0100

genirq: Add an extra comment about the use of affinity in irq_common_data

Affinity will have dual meaning depends on the type of the irq. If it is
a normal irq, it'll have the standard affinity meaning.

If it is an IPI, it will hold the mask of the cpus to which an IPI can be
sent.

Signed-off-by: Qais Yousef <qais.yousef@...tec.com>
Cc: <jason@...edaemon.net>
Cc: <marc.zyngier@....com>
Cc: <jiang.liu@...ux.intel.com>
Cc: <ralf@...ux-mips.org>
Cc: <linux-mips@...ux-mips.org>
Cc: <lisa.parratt@...tec.com>
Cc: Qais Yousef <qsyousef@...il.com>
Link: http://lkml.kernel.org/r/1449580830-23652-7-git-send-email-qais.yousef@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 include/linux/irq.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 3c1c967..0817afd 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -133,7 +133,9 @@ struct irq_domain;
  *			Use accessor functions to deal with it
  * @node:		node index useful for balancing
  * @handler_data:	per-IRQ data for the irq_chip methods
- * @affinity:		IRQ affinity on SMP
+ * @affinity:		IRQ affinity on SMP. If this is an IPI
+ *			related irq, then this is the mask of the
+ *			CPUs to which an IPI can be sent.
  * @msi_desc:		MSI descriptor
  */
 struct irq_common_data {