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authorQais Yousef <qais.yousef@imgtec.com>2015-12-08 13:20:17 +0000
committerThomas Gleixner <tglx@linutronix.de>2016-02-25 10:56:55 +0100
commit955bfe5912e7839abcc83694f06867535487404b (patch)
tree50814a31e1ac2d9370249ab786aa11043b796851 /include/linux/irq.h
parent379b656446a36c7a80b27cbdc34eec8e57b5f290 (diff)
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@imgtec.com> Cc: <jason@lakedaemon.net> Cc: <marc.zyngier@arm.com> Cc: <jiang.liu@linux.intel.com> Cc: <ralf@linux-mips.org> Cc: <linux-mips@linux-mips.org> Cc: <lisa.parratt@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Link: http://lkml.kernel.org/r/1449580830-23652-7-git-send-email-qais.yousef@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/irq.h')
-rw-r--r--include/linux/irq.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 3c1c96786248..0817afd0d719 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 {