Messages in this thread Patch in this message | | | Date | Fri, 18 Aug 2017 01:57:42 -0700 | From | tip-bot for Marc Zyngier <> | Subject | [tip:irq/core] genirq: Restrict effective affinity to interrupts actually using it |
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Commit-ID: 74def747bcd09692bdbf8c6a15350795b0f11ca8 Gitweb: http://git.kernel.org/tip/74def747bcd09692bdbf8c6a15350795b0f11ca8 Author: Marc Zyngier <marc.zyngier@arm.com> AuthorDate: Fri, 18 Aug 2017 09:39:14 +0100 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Fri, 18 Aug 2017 10:54:39 +0200
genirq: Restrict effective affinity to interrupts actually using it
Just because CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK is selected doesn't mean that all the interrupts are using the effective affinity mask. For a number of them, this mask is likely to be empty.
In order to deal with this, let's restrict the use of the effective affinity mask to these interrupts that have a non empty effective affinity.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Lunn <andrew@lunn.ch> Cc: James Hogan <james.hogan@imgtec.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Chris Zankel <chris@zankel.net> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Wei Xu <xuwei5@hisilicon.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Gregory Clement <gregory.clement@free-electrons.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Link: http://lkml.kernel.org/r/20170818083925.10108-2-marc.zyngier@arm.com
--- include/linux/irq.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/irq.h b/include/linux/irq.h index d2d54379..dcfac6c 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -781,7 +781,10 @@ static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d) static inline struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d) { - return d->common->effective_affinity; + if (!cpumask_empty(d->common->effective_affinity)) + return d->common->effective_affinity; + + return d->common->affinity; } static inline void irq_data_update_effective_affinity(struct irq_data *d, const struct cpumask *m)
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