Commit-ID: 74def747bcd09692bdbf8c6a15350795b0f11ca8 Gitweb: http://git.kernel.org/tip/74def747bcd09692bdbf8c6a15350795b0f11ca8 Author: Marc Zyngier <[email protected]> AuthorDate: Fri, 18 Aug 2017 09:39:14 +0100 Committer: Thomas Gleixner <[email protected]> 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 <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: Andrew Lunn <[email protected]> Cc: James Hogan <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Paul Burton <[email protected]> Cc: Chris Zankel <[email protected]> Cc: Kevin Cernekee <[email protected]> Cc: Wei Xu <[email protected]> Cc: Max Filippov <[email protected]> Cc: Florian Fainelli <[email protected]> Cc: Gregory Clement <[email protected]> Cc: Matt Redfearn <[email protected]> Cc: Sebastian Hesselbarth <[email protected]> Link: http://lkml.kernel.org/r/[email protected] --- 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)
