From: Ian Campbell Date: Thu, 10 Mar 2011 16:08:09 +0000 (+0000) Subject: xen: events: turn irq_info constructors into initialiser functions X-Git-Tag: firefly_0821_release~7613^2~2166^3~8 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9158c3588a0693ef11208f5961f0d6b0241694d8;p=firefly-linux-kernel-4.4.55.git xen: events: turn irq_info constructors into initialiser functions Signed-off-by: Ian Campbell Signed-off-by: Konrad Rzeszutek Wilk --- diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 2dffa43696d8..72725faa2e85 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -118,46 +118,76 @@ static struct irq_chip xen_dynamic_chip; static struct irq_chip xen_percpu_chip; static struct irq_chip xen_pirq_chip; -/* Constructor for packed IRQ information. */ -static struct irq_info mk_unbound_info(void) +/* Get info for IRQ */ +static struct irq_info *info_for_irq(unsigned irq) { - return (struct irq_info) { .type = IRQT_UNBOUND }; + return &irq_info[irq]; } -static struct irq_info mk_evtchn_info(unsigned short evtchn) +/* Constructors for packed IRQ information. */ +static void xen_irq_info_common_init(struct irq_info *info, + enum xen_irq_type type, + unsigned short evtchn, + unsigned short cpu) { - return (struct irq_info) { .type = IRQT_EVTCHN, .evtchn = evtchn, - .cpu = 0 }; + + BUG_ON(info->type != IRQT_UNBOUND && info->type != type); + + info->type = type; + info->evtchn = evtchn; + info->cpu = cpu; } -static struct irq_info mk_ipi_info(unsigned short evtchn, enum ipi_vector ipi) +static void xen_irq_info_evtchn_init(unsigned irq, + unsigned short evtchn) { - return (struct irq_info) { .type = IRQT_IPI, .evtchn = evtchn, - .cpu = 0, .u.ipi = ipi }; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, IRQT_EVTCHN, evtchn, 0); } -static struct irq_info mk_virq_info(unsigned short evtchn, unsigned short virq) +static void xen_irq_info_ipi_init(unsigned irq, + unsigned short evtchn, + enum ipi_vector ipi) { - return (struct irq_info) { .type = IRQT_VIRQ, .evtchn = evtchn, - .cpu = 0, .u.virq = virq }; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, IRQT_IPI, evtchn, 0); + + info->u.ipi = ipi; } -static struct irq_info mk_pirq_info(unsigned short evtchn, unsigned short pirq, - unsigned short gsi, unsigned short vector) +static void xen_irq_info_virq_init(unsigned irq, + unsigned short evtchn, + unsigned short virq) { - return (struct irq_info) { .type = IRQT_PIRQ, .evtchn = evtchn, - .cpu = 0, - .u.pirq = { .pirq = pirq, .gsi = gsi, .vector = vector } }; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, IRQT_VIRQ, evtchn, 0); + + info->u.virq = virq; } -/* - * Accessors for packed IRQ information. - */ -static struct irq_info *info_for_irq(unsigned irq) +static void xen_irq_info_pirq_init(unsigned irq, + unsigned short evtchn, + unsigned short pirq, + unsigned short gsi, + unsigned short vector, + unsigned char flags) { - return &irq_info[irq]; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, IRQT_PIRQ, evtchn, 0); + + info->u.pirq.pirq = pirq; + info->u.pirq.gsi = gsi; + info->u.pirq.vector = vector; + info->u.pirq.flags = flags; } +/* + * Accessors for packed IRQ information. + */ static unsigned int evtchn_from_irq(unsigned irq) { if (unlikely(WARN(irq < 0 || irq >= nr_irqs, "Invalid irq %d!\n", irq))) @@ -414,6 +444,8 @@ static int xen_allocate_irq_gsi(unsigned gsi) static void xen_free_irq(unsigned irq) { + irq_info[irq].type = IRQT_UNBOUND; + /* Legacy IRQ descriptors are managed by the arch. */ if (irq < NR_IRQS_LEGACY) return; @@ -610,8 +642,8 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi, goto out; } - irq_info[irq] = mk_pirq_info(0, pirq, gsi, irq_op.vector); - irq_info[irq].u.pirq.flags |= shareable ? PIRQ_SHAREABLE : 0; + xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector, + shareable ? PIRQ_SHAREABLE : 0); pirq_to_irq[pirq] = irq; out: @@ -649,7 +681,7 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, set_irq_chip_and_handler_name(irq, &xen_pirq_chip, handle_level_irq, name); - irq_info[irq] = mk_pirq_info(0, pirq, 0, vector); + xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, 0); pirq_to_irq[pirq] = irq; ret = set_irq_msi(irq, msidesc); if (ret < 0) @@ -688,8 +720,6 @@ int xen_destroy_irq(int irq) } pirq_to_irq[info->u.pirq.pirq] = -1; - irq_info[irq] = mk_unbound_info(); - xen_free_irq(irq); out: @@ -717,7 +747,7 @@ int bind_evtchn_to_irq(unsigned int evtchn) handle_fasteoi_irq, "event"); evtchn_to_irq[evtchn] = irq; - irq_info[irq] = mk_evtchn_info(evtchn); + xen_irq_info_evtchn_init(irq, evtchn); } spin_unlock(&irq_mapping_update_lock); @@ -750,7 +780,7 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) evtchn = bind_ipi.port; evtchn_to_irq[evtchn] = irq; - irq_info[irq] = mk_ipi_info(evtchn, ipi); + xen_irq_info_ipi_init(irq, evtchn, ipi); per_cpu(ipi_to_irq, cpu)[ipi] = irq; bind_evtchn_to_cpu(evtchn, cpu); @@ -785,7 +815,7 @@ int bind_virq_to_irq(unsigned int virq, unsigned int cpu) evtchn = bind_virq.port; evtchn_to_irq[evtchn] = irq; - irq_info[irq] = mk_virq_info(evtchn, virq); + xen_irq_info_virq_init(irq, evtchn, virq); per_cpu(virq_to_irq, cpu)[virq] = irq; @@ -828,11 +858,9 @@ static void unbind_from_irq(unsigned int irq) evtchn_to_irq[evtchn] = -1; } - if (irq_info[irq].type != IRQT_UNBOUND) { - irq_info[irq] = mk_unbound_info(); + BUG_ON(irq_info[irq].type == IRQT_UNBOUND); - xen_free_irq(irq); - } + xen_free_irq(irq); spin_unlock(&irq_mapping_update_lock); } @@ -1093,7 +1121,7 @@ void rebind_evtchn_irq(int evtchn, int irq) BUG_ON(info->type == IRQT_UNBOUND); evtchn_to_irq[evtchn] = irq; - irq_info[irq] = mk_evtchn_info(evtchn); + xen_irq_info_evtchn_init(irq, evtchn); spin_unlock(&irq_mapping_update_lock); @@ -1229,7 +1257,7 @@ static void restore_pirqs(void) if (rc) { printk(KERN_WARNING "xen map irq failed gsi=%d irq=%d pirq=%d rc=%d\n", gsi, irq, pirq, rc); - irq_info[irq] = mk_unbound_info(); + xen_free_irq(irq); pirq_to_irq[pirq] = -1; continue; } @@ -1261,7 +1289,7 @@ static void restore_cpu_virqs(unsigned int cpu) /* Record the new mapping. */ evtchn_to_irq[evtchn] = irq; - irq_info[irq] = mk_virq_info(evtchn, virq); + xen_irq_info_virq_init(irq, evtchn, virq); bind_evtchn_to_cpu(evtchn, cpu); } } @@ -1286,7 +1314,7 @@ static void restore_cpu_ipis(unsigned int cpu) /* Record the new mapping. */ evtchn_to_irq[evtchn] = irq; - irq_info[irq] = mk_ipi_info(evtchn, ipi); + xen_irq_info_ipi_init(irq, evtchn, ipi); bind_evtchn_to_cpu(evtchn, cpu); } }