Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1178363

RE: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding control

Show all headers | View raw

> -----Original Message-----
> From: Paolo Bonzini [mailto:pbonzini@redhat.com]
> Sent: Tuesday, July 07, 2015 7:14 PM
> To: Wu, Feng; Eric Auger; eric.auger@st.com;
> linux-arm-kernel@lists.infradead.org; kvmarm@lists.cs.columbia.edu;
> kvm@vger.kernel.org; christoffer.dall@linaro.org; marc.zyngier@arm.com;
> alex.williamson@redhat.com; avi.kivity@gmail.com; mtosatti@redhat.com;
> joro@8bytes.org; b.reynal@virtualopensystems.com
> Cc: linux-kernel@vger.kernel.org; patches@linaro.org
> Subject: Re: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding
> control
> 
> 
> 
> On 07/07/2015 13:13, Wu, Feng wrote:
> >> > You can use container_of to add it to your own struct, e.g.
> >> >
> >> > 	struct irq_bypass_consumer cons;
> >> > 	struct irq_bypass_producer *prod;
> > Do you mean this:
> >
> > struct kvm_kernel_irqfd {
> >
> > 	......
> >
> > 	struct irq_bypass_consumer cons;
> > 	struct irq_bypass_producer *prod;
> > };
> 
> Yes.

Then I still need assign prod and de-assign prod in irq_bypass_register_consumer/irq_bypass_unregister_consumer,
Right? Would you please share why this is better. My original though is as below:

diff --git a/include/linux/irqbypass.h b/include/linux/irqbypass.h
index 8f62235..11930c1 100644
--- a/include/linux/irqbypass.h
+++ b/include/linux/irqbypass.h
@@ -20,6 +20,7 @@ struct irq_bypass_producer {
 struct irq_bypass_consumer {
        struct list_head node;
        void *token;
+       struct irq_bypass_producer *producer;
        void (*stop)(struct irq_bypass_consumer *);
        void (*resume)(struct irq_bypass_consumer *);
        void (*add_producer)(struct irq_bypass_consumer *,
diff --git a/kernel/irq/bypass.c b/kernel/irq/bypass.c
index efadbe5..be2da25 100644
--- a/kernel/irq/bypass.c
+++ b/kernel/irq/bypass.c
@@ -122,6 +122,7 @@ int irq_bypass_register_consumer(struct irq_bypass_consumer *consumer)

        list_for_each_entry(producer, &producers, node) {
                if (producer->token == consumer->token) {
+                       consumer->producer = producer;
                        connect(producer, consumer);
                        break;
                }
@@ -140,6 +141,7 @@ void irq_bypass_unregister_consumer(struct irq_bypass_consumer *consumer)

        list_for_each_entry(producer, &producers, node) {
                if (producer->token == consumer->token) {
+                       consumer->producer = NULL;
                        disconnect(producer, consumer);
                        break;
                }

Thanks,
Feng

> 
> Paolo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

RE: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding  control "Wu, Feng" <feng.wu@intel.com> - 2015-07-07 13:00 +0200
  Re: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding  control Paolo Bonzini <pbonzini@redhat.com> - 2015-07-07 13:10 +0200
    Re: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding  control Paolo Bonzini <pbonzini@redhat.com> - 2015-07-07 13:20 +0200
      RE: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding  control "Wu, Feng" <feng.wu@intel.com> - 2015-07-07 13:20 +0200
    RE: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding  control "Wu, Feng" <feng.wu@intel.com> - 2015-07-07 13:20 +0200

csiph-web