arm: rename link to inflight

The link field in pending_irq has a confusing name so rename it to
inflight and comment its behaviour.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

3 files changed, 10 insertions, 8 deletions

diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index 15c315fd2b..60a51b5427 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -481,8 +481,8 @@ static void maintenance_interrupt(int irq, void *dev_id, struct cpu_user_regs *r
                 GICC[GICC_DIR] = virq;
             }
             gic_inject_irq_stop();
-            list_del(&p->link);
-            INIT_LIST_HEAD(&p->link);
+            list_del(&p->inflight);
+            INIT_LIST_HEAD(&p->inflight);
             cpu_raise_softirq(current->processor, VGIC_SOFTIRQ);
             spin_unlock(&current->arch.vgic.lock);
         }
diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 584e6828a3..dd996292a1 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -85,7 +85,7 @@ int domain_vgic_init(struct domain *d)
         xmalloc_array(struct pending_irq,
                 d->arch.vgic.nr_lines + (32 * d->max_vcpus));
     for (i=0; i<d->arch.vgic.nr_lines + (32 * d->max_vcpus); i++)
-        INIT_LIST_HEAD(&d->arch.vgic.pending_irqs[i].link);
+        INIT_LIST_HEAD(&d->arch.vgic.pending_irqs[i].inflight);
     for (i=0; i<DOMAIN_NR_RANKS(d); i++)
         spin_lock_init(&d->arch.vgic.shared_irqs[i].lock);
     return 0;
@@ -550,7 +550,7 @@ void vgic_vcpu_inject_irq(struct vcpu *v, unsigned int irq, int virtual)
     struct pending_irq *iter, *n = irq_to_pending(v, irq);
 
     /* irq still pending */
-    if (!list_empty(&n->link))
+    if (!list_empty(&n->inflight))
         return;
 
     priority = byte_read(rank->ipriority[REG_RANK_INDEX(8, idx)], 0, byte);
@@ -565,16 +565,16 @@ void vgic_vcpu_inject_irq(struct vcpu *v, unsigned int irq, int virtual)
     gic_set_guest_irq(irq, GICH_LR_PENDING, priority);
 
     spin_lock(&v->arch.vgic.lock);
-    list_for_each_entry ( iter, &v->arch.vgic.inflight_irqs, link )
+    list_for_each_entry ( iter, &v->arch.vgic.inflight_irqs, inflight )
     {
         if ( iter->priority < priority )
         {
-            list_add_tail(&n->link, &iter->link);
+            list_add_tail(&n->inflight, &iter->inflight);
             spin_unlock(&v->arch.vgic.lock);
             return;
         }
     }
-    list_add(&n->link, &v->arch.vgic.inflight_irqs);
+    list_add(&n->inflight, &v->arch.vgic.inflight_irqs);
     spin_unlock(&v->arch.vgic.lock);
     /* we have a new higher priority irq, inject it into the guest */
     cpu_raise_softirq(v->processor, VGIC_SOFTIRQ);
diff --git a/xen/include/asm-arm/domain.h b/xen/include/asm-arm/domain.h
index c1afd19f92..d01534bbc5 100644
--- a/xen/include/asm-arm/domain.h
+++ b/xen/include/asm-arm/domain.h
@@ -20,7 +20,9 @@ struct pending_irq
     int irq;
     struct irq_desc *desc; /* only set it the irq corresponds to a physical irq */
     uint8_t priority;
-    struct list_head link;
+    /* inflight is used to append instances of pending_irq to
+     * vgic.inflight_irqs */
+    struct list_head inflight;
 };
 
 struct arch_domain