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    Subject[irqchip: irq/irqchip-next] genirq: Define ack_irq() and eoi_irq() helpers
    The following commit has been merged into the irq/irqchip-next branch of irqchip:

    Commit-ID: 635e4fd40660d189e1a83973ddd663abf7bbc849
    Gitweb: https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/635e4fd40660d189e1a83973ddd663abf7bbc849
    Author: Valentin Schneider <valentin.schneider@arm.com>
    AuthorDate: Tue, 29 Jun 2021 13:49:59 +01:00
    Committer: Marc Zyngier <maz@kernel.org>
    CommitterDate: Thu, 12 Aug 2021 15:48:19 +01:00

    genirq: Define ack_irq() and eoi_irq() helpers

    The newly-added IRQCHIP_AUTOMASKS_FLOW flag requires some additional
    bookkeeping around chip->{irq_ack, irq_eoi}() calls. Define wrappers around
    those chip callbacks to drive the IRQD_IRQ_FLOW_MASKED state of an IRQ when
    the chip has the IRQCHIP_AUTOMASKS_FLOW flag.

    Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
    Signed-off-by: Marc Zyngier <maz@kernel.org>
    Link: https://lore.kernel.org/r/20210629125010.458872-3-valentin.schneider@arm.com
    ---
    kernel/irq/chip.c | 16 ++++++++++++++++
    kernel/irq/internals.h | 2 ++
    2 files changed, 18 insertions(+)

    diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
    index 21a21ba..793dbd8 100644
    --- a/kernel/irq/chip.c
    +++ b/kernel/irq/chip.c
    @@ -408,6 +408,22 @@ void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
    cpumask_clear_cpu(cpu, desc->percpu_enabled);
    }

    +void ack_irq(struct irq_desc *desc)
    +{
    + desc->irq_data.chip->irq_ack(&desc->irq_data);
    +
    + if (desc->irq_data.chip->flags & IRQCHIP_AUTOMASKS_FLOW)
    + irq_state_set_flow_masked(desc);
    +}
    +
    +void eoi_irq(struct irq_desc *desc)
    +{
    + desc->irq_data.chip->irq_eoi(&desc->irq_data);
    +
    + if (desc->irq_data.chip->flags & IRQCHIP_AUTOMASKS_FLOW)
    + irq_state_clr_flow_masked(desc);
    +}
    +
    static inline void mask_ack_irq(struct irq_desc *desc)
    {
    if (desc->irq_data.chip->irq_mask_ack) {
    diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
    index b6c1cce..6d6a621 100644
    --- a/kernel/irq/internals.h
    +++ b/kernel/irq/internals.h
    @@ -87,6 +87,8 @@ extern void irq_enable(struct irq_desc *desc);
    extern void irq_disable(struct irq_desc *desc);
    extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
    extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
    +extern void ack_irq(struct irq_desc *desc);
    +extern void eoi_irq(struct irq_desc *desc);
    extern void mask_irq(struct irq_desc *desc);
    extern void unmask_irq(struct irq_desc *desc);
    extern void unmask_threaded_irq(struct irq_desc *desc);
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      Last update: 2021-08-12 17:42    [W:6.713 / U:0.876 seconds]
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