Commit-ID: e019c249a60fc50319c5897d21d36207c257cc9e
Gitweb: http://git.kernel.org/tip/e019c249a60fc50319c5897d21d36207c257cc9e
Author: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
AuthorDate: Tue, 23 Jun 2015 20:29:34 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sat, 11 Jul 2015 23:14:25 +0200
genirq: Provide and use __irq_can_set_affinity()
Provide a irq_desc based variant of irq_can_set_affinity() to avoid a
redundant lookup for the core code users.
[ tglx: Split out from combo patch ]
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
kernel/irq/manage.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index d526ac1..f5b7742 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -115,6 +115,14 @@ EXPORT_SYMBOL(synchronize_irq);
#ifdef CONFIG_SMP
cpumask_var_t irq_default_affinity;
+static int __irq_can_set_affinity(struct irq_desc *desc)
+{
+ if (!desc || !irqd_can_balance(&desc->irq_data) ||
+ !desc->irq_data.chip || !desc->irq_data.chip->irq_set_affinity)
+ return 0;
+ return 1;
+}
+
/**
* irq_can_set_affinity - Check if the affinity of a given irq can be set
* @irq: Interrupt to check
@@ -122,13 +130,7 @@ cpumask_var_t irq_default_affinity;
*/
int irq_can_set_affinity(unsigned int irq)
{
- struct irq_desc *desc = irq_to_desc(irq);
-
- if (!desc || !irqd_can_balance(&desc->irq_data) ||
- !desc->irq_data.chip || !desc->irq_data.chip->irq_set_affinity)
- return 0;
-
- return 1;
+ return __irq_can_set_affinity(irq_to_desc(irq));
}
/**
@@ -366,7 +368,7 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
int node = irq_desc_get_node(desc);
/* Excludes PER_CPU and NO_BALANCE interrupts */
- if (!irq_can_set_affinity(irq))
+ if (!__irq_can_set_affinity(desc))
return 0;
/*
--
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