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    Subject[patch 29/52] x86/vector: Store the single CPU targets in apic data
    Now that the interrupt affinities are targeted at single CPUs storing them
    in a cpumask is overkill. Store them in a dedicated variable.

    This does not yet remove the domain cpumasks because the current allocator
    relies on them. Preparatory change for the allocator rework.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    arch/x86/kernel/apic/vector.c | 5 +++++
    1 file changed, 5 insertions(+)

    --- a/arch/x86/kernel/apic/vector.c
    +++ b/arch/x86/kernel/apic/vector.c
    @@ -23,6 +23,8 @@

    struct apic_chip_data {
    struct irq_cfg cfg;
    + unsigned int cpu;
    + unsigned int prev_cpu;
    cpumask_var_t domain;
    cpumask_var_t old_domain;
    u8 move_in_progress : 1;
    @@ -214,6 +216,7 @@ static int __assign_irq_vector(int irq,
    cpumask_and(d->old_domain, d->old_domain, cpu_online_mask);
    d->move_in_progress = !cpumask_empty(d->old_domain);
    d->cfg.old_vector = d->move_in_progress ? d->cfg.vector : 0;
    + d->prev_cpu = d->cpu;
    d->cfg.vector = vector;
    cpumask_copy(d->domain, vector_cpumask);
    success:
    @@ -228,6 +231,7 @@ static int __assign_irq_vector(int irq,
    cpumask_and(vector_searchmask, vector_searchmask, mask);
    BUG_ON(apic->cpu_mask_to_apicid(vector_searchmask, irqd,
    &d->cfg.dest_apicid));
    + d->cpu = cpumask_first(vector_searchmask);
    return 0;
    }

    @@ -428,6 +432,7 @@ static void __init init_legacy_irqs(void

    apicd->cfg.vector = ISA_IRQ_VECTOR(i);
    cpumask_copy(apicd->domain, cpumask_of(0));
    + apicd->cpu = 0;
    irq_set_chip_data(i, apicd);
    }
    }

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