diff options
Diffstat (limited to 'arch/powerpc')
43 files changed, 230 insertions, 1211 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 1919634a9b3..303703d716f 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -135,6 +135,7 @@ config PPC select HAVE_GENERIC_HARDIRQS select HAVE_SPARSE_IRQ select IRQ_PER_CPU + select IRQ_DOMAIN select GENERIC_IRQ_SHOW select GENERIC_IRQ_SHOW_LEVEL select IRQ_FORCED_THREADING diff --git a/arch/powerpc/include/asm/ehv_pic.h b/arch/powerpc/include/asm/ehv_pic.h index a9e1f4f796f..dc7d48e3ea9 100644 --- a/arch/powerpc/include/asm/ehv_pic.h +++ b/arch/powerpc/include/asm/ehv_pic.h @@ -25,7 +25,7 @@ struct ehv_pic { /* The remapper for this EHV_PIC */ - struct irq_host *irqhost; + struct irq_domain *irqhost; /* The "linux" controller struct */ struct irq_chip hc_irq; diff --git a/arch/powerpc/include/asm/i8259.h b/arch/powerpc/include/asm/i8259.h index 105ade297aa..c3fdfbd5a67 100644 --- a/arch/powerpc/include/asm/i8259.h +++ b/arch/powerpc/include/asm/i8259.h @@ -6,7 +6,7 @@ extern void i8259_init(struct device_node *node, unsigned long intack_addr); extern unsigned int i8259_irq(void); -extern struct irq_host *i8259_get_host(void); +extern struct irq_domain *i8259_get_host(void); #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_I8259_H */ diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h index c0e1bc319e3..fe0b09dceb7 100644 --- a/arch/powerpc/include/asm/irq.h +++ b/arch/powerpc/include/asm/irq.h @@ -9,6 +9,7 @@ * 2 of the License, or (at your option) any later version. */ +#include <linux/irqdomain.h> #include <linux/threads.h> #include <linux/list.h> #include <linux/radix-tree.h> @@ -35,258 +36,12 @@ extern atomic_t ppc_n_lost_interrupts; /* Total number of virq in the platform */ #define NR_IRQS CONFIG_NR_IRQS -/* Number of irqs reserved for the legacy controller */ -#define NUM_ISA_INTERRUPTS 16 - /* Same thing, used by the generic IRQ code */ #define NR_IRQS_LEGACY NUM_ISA_INTERRUPTS -/* This type is the placeholder for a hardware interrupt number. It has to - * be big enough to enclose whatever representation is used by a given - * platform. - */ -typedef unsigned long irq_hw_number_t; - -/* Interrupt controller "host" data structure. This could be defined as a - * irq domain controller. That is, it handles the mapping between hardware - * and virtual interrupt numbers for a given interrupt domain. The host - * structure is generally created by the PIC code for a given PIC instance - * (though a host can cover more than one PIC if they have a flat number - * model). It's the host callbacks that are responsible for setting the - * irq_chip on a given irq_desc after it's been mapped. - * - * The host code and data structures are fairly agnostic to the fact that - * we use an open firmware device-tree. We do have references to struct - * device_node in two places: in irq_find_host() to find the host matching - * a given interrupt controller node, and of course as an argument to its - * counterpart host->ops->match() callback. However, those are treated as - * generic pointers by the core and the fact that it's actually a device-node - * pointer is purely a convention between callers and implementation. This - * code could thus be used on other architectures by replacing those two - * by some sort of arch-specific void * "token" used to identify interrupt - * controllers. - */ -struct irq_host; -struct radix_tree_root; - -/* Functions below are provided by the host and called whenever a new mapping - * is created or an old mapping is disposed. The host can then proceed to - * whatever internal data structures management is required. It also needs - * to setup the irq_desc when returning from map(). - */ -struct irq_host_ops { - /* Match an interrupt controller device node to a host, returns - * 1 on a match - */ - int (*match)(struct irq_host *h, struct device_node *node); - - /* Create or update a mapping between a virtual irq number and a hw - * irq number. This is called only once for a given mapping. - */ - int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); - - /* Dispose of such a mapping */ - void (*unmap)(struct irq_host *h, unsigned int virq); - - /* Translate device-tree interrupt specifier from raw format coming - * from the firmware to a irq_hw_number_t (interrupt line number) and - * type (sense) that can be passed to set_irq_type(). In the absence - * of this callback, irq_create_of_mapping() and irq_of_parse_and_map() - * will return the hw number in the first cell and IRQ_TYPE_NONE for - * the type (which amount to keeping whatever default value the - * interrupt controller has for that line) - */ - int (*xlate)(struct irq_host *h, struct device_node *ctrler, - const u32 *intspec, unsigned int intsize, - irq_hw_number_t *out_hwirq, unsigned int *out_type); -}; - -struct irq_host { - struct list_head link; - - /* type of reverse mapping technique */ - unsigned int revmap_type; -#define IRQ_HOST_MAP_LEGACY 0 /* legacy 8259, gets irqs 1..15 */ -#define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */ -#define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */ -#define IRQ_HOST_MAP_TREE 3 /* radix tree */ - union { - struct { - unsigned int size; - unsigned int *revmap; - } linear; - struct radix_tree_root tree; - } revmap_data; - struct irq_host_ops *ops; - void *host_data; - irq_hw_number_t inval_irq; - - /* Optional device node pointer */ - struct device_node *of_node; -}; - struct irq_data; extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d); extern irq_hw_number_t virq_to_hw(unsigned int virq); -extern bool virq_is_host(unsigned int virq, struct irq_host *host); - -/** - * irq_alloc_host - Allocate a new irq_host data structure - * @of_node: optional device-tree node of the interrupt controller - * @revmap_type: type of reverse mapping to use - * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map - * @ops: map/unmap host callbacks - * @inval_irq: provide a hw number in that host space that is always invalid - * - * Allocates and initialize and irq_host structure. Note that in the case of - * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns - * for all legacy interrupts except 0 (which is always the invalid irq for - * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by - * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated - * later during boot automatically (the reverse mapping will use the slow path - * until that happens). - */ -extern struct irq_host *irq_alloc_host(struct device_node *of_node, - unsigned int revmap_type, - unsigned int revmap_arg, - struct irq_host_ops *ops, - irq_hw_number_t inval_irq); - - -/** - * irq_find_host - Locates a host for a given device node - * @node: device-tree node of the interrupt controller - */ -extern struct irq_host *irq_find_host(struct device_node *node); - - -/** - * irq_set_default_host - Set a "default" host - * @host: default host pointer - * - * For convenience, it's possible to set a "default" host that will be used - * whenever NULL is passed to irq_create_mapping(). It makes life easier for - * platforms that want to manipulate a few hard coded interrupt numbers that - * aren't properly represented in the device-tree. - */ -extern void irq_set_default_host(struct irq_host *host); - - -/** - * irq_set_virq_count - Set the maximum number of virt irqs - * @count: number of linux virtual irqs, capped with NR_IRQS - * - * This is mainly for use by platforms like iSeries who want to program - * the virtual irq number in the controller to avoid the reverse mapping - */ -extern void irq_set_virq_count(unsigned int count); - - -/** - * irq_create_mapping - Map a hardware interrupt into linux virq space - * @host: host owning this hardware interrupt or NULL for default host - * @hwirq: hardware irq number in that host space - * - * Only one mapping per hardware interrupt is permitted. Returns a linux - * virq number. - * If the sense/trigger is to be specified, set_irq_type() should be called - * on the number returned from that call. - */ -extern unsigned int irq_create_mapping(struct irq_host *host, - irq_hw_number_t hwirq); - - -/** - * irq_dispose_mapping - Unmap an interrupt - * @virq: linux virq number of the interrupt to unmap - */ -extern void irq_dispose_mapping(unsigned int virq); - -/** - * irq_find_mapping - Find a linux virq from an hw irq number. - * @host: host owning this hardware interrupt - * @hwirq: hardware irq number in that host space - * - * This is a slow path, for use by generic code. It's expected that an - * irq controller implementation directly calls the appropriate low level - * mapping function. - */ -extern unsigned int irq_find_mapping(struct irq_host *host, - irq_hw_number_t hwirq); - -/** - * irq_create_direct_mapping - Allocate a virq for direct mapping - * @host: host to allocate the virq for or NULL for default host - * - * This routine is used for irq controllers which can choose the hardware - * interrupt numbers they generate. In such a case it's simplest to use - * the linux virq as the hardware interrupt number. - */ -extern unsigned int irq_create_direct_mapping(struct irq_host *host); - -/** - * irq_radix_revmap_insert - Insert a hw irq to linux virq number mapping. - * @host: host owning this hardware interrupt - * @virq: linux irq number - * @hwirq: hardware irq number in that host space - * - * This is for use by irq controllers that use a radix tree reverse - * mapping for fast lookup. - */ -extern void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq, - irq_hw_number_t hwirq); - -/** - * irq_radix_revmap_lookup - Find a linux virq from a hw irq number. - * @host: host owning this hardware interrupt - * @hwirq: hardware irq number in that host space - * - * This is a fast path, for use by irq controller code that uses radix tree - * revmaps - */ -extern unsigned int irq_radix_revmap_lookup(struct irq_host *host, - irq_hw_number_t hwirq); - -/** - * irq_linear_revmap - Find a linux virq from a hw irq number. - * @host: host owning this hardware interrupt - * @hwirq: hardware irq number in that host space - * - * This is a fast path, for use by irq controller code that uses linear - * revmaps. It does fallback to the slow path if the revmap doesn't exist - * yet and will create the revmap entry with appropriate locking - */ - -extern unsigned int irq_linear_revmap(struct irq_host *host, - irq_hw_number_t hwirq); - - - -/** - * irq_alloc_virt - Allocate virtual irq numbers - * @host: host owning these new virtual irqs - * @count: number of consecutive numbers to allocate - * @hint: pass a hint number, the allocator will try to use a 1:1 mapping - * - * This is a low level function that is used internally by irq_create_mapping() - * and that can be used by some irq controllers implementations for things - * like allocating ranges of numbers for MSIs. The revmaps are left untouched. - */ -extern unsigned int irq_alloc_virt(struct irq_host *host, - unsigned int count, - unsigned int hint); - -/** - * irq_free_virt - Free virtual irq numbers - * @virq: virtual irq number of the first interrupt to free - * @count: number of interrupts to free - * - * This function is the opposite of irq_alloc_virt. It will not clear reverse - * maps, this should be done previously by unmap'ing the interrupt. In fact, - * all interrupts covered by the range being freed should have been unmapped - * prior to calling this. - */ -extern void irq_free_virt(unsigned int virq, unsigned int count); /** * irq_early_init - Init irq remapping subsystem diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h index 67b4d983723..a5b7c56237f 100644 --- a/arch/powerpc/include/asm/mpic.h +++ b/arch/powerpc/include/asm/mpic.h @@ -255,7 +255,7 @@ struct mpic struct device_node *node; /* The remapper for this MPIC */ - struct irq_host *irqhost; + struct irq_domain *irqhost; /* The "linux" controller struct */ struct irq_chip hc_irq; diff --git a/arch/powerpc/include/asm/xics.h b/arch/powerpc/include/asm/xics.h index c48de98ba94..4ae9a09c3b8 100644 --- a/arch/powerpc/include/asm/xics.h +++ b/arch/powerpc/include/asm/xics.h @@ -86,7 +86,7 @@ struct ics { extern unsigned int xics_default_server; extern unsigned int xics_default_distrib_server; extern unsigned int xics_interrupt_server_size; -extern struct irq_host *xics_host; +extern struct irq_domain *xics_host; struct xics_cppr { unsigned char stack[MAX_NUM_PRIORITIES]; diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 701d4aceb4f..e3673ff6b7a 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -486,409 +486,19 @@ void do_softirq(void) local_irq_restore(flags); } - -/* - * IRQ controller and virtual interrupts - */ - -/* The main irq map itself is an array of NR_IRQ entries containing the - * associate host and irq number. An entry with a host of NULL is free. - * An entry can be allocated if it's free, the allocator always then sets - * hwirq first to the host's invalid irq number and then fills ops. - */ -struct irq_map_entry { - irq_hw_number_t hwirq; - struct irq_host *host; -}; - -static LIST_HEAD(irq_hosts); -static DEFINE_RAW_SPINLOCK(irq_big_lock); -static DEFINE_MUTEX(revmap_trees_mutex); -static struct irq_map_entry irq_map[NR_IRQS]; -static unsigned int irq_virq_count = NR_IRQS; -static struct irq_host *irq_default_host; - irq_hw_number_t irqd_to_hwirq(struct irq_data *d) { - return irq_map[d->irq].hwirq; + return d->hwirq; } EXPORT_SYMBOL_GPL(irqd_to_hwirq); irq_hw_number_t virq_to_hw(unsigned int virq) { - return irq_map[virq].hwirq; + struct irq_data *irq_data = irq_get_irq_data(virq); + return WARN_ON(!irq_data) ? 0 : irq_data->hwirq; } EXPORT_SYMBOL_GPL(virq_to_hw); -bool virq_is_host(unsigned int virq, struct irq_host *host) -{ - return irq_map[virq].host == host; -} -EXPORT_SYMBOL_GPL(virq_is_host); - -static int default_irq_host_match(struct irq_host *h, struct device_node *np) -{ - return h->of_node != NULL && h->of_node == np; -} - -struct irq_host *irq_alloc_host(struct device_node *of_node, - unsigned int revmap_type, - unsigned int revmap_arg, - struct irq_host_ops *ops, - irq_hw_number_t inval_irq) -{ - struct irq_host *host; - unsigned int size = sizeof(struct irq_host); - unsigned int i; - unsigned int *rmap; - unsigned long flags; - - /* Allocate structure and revmap table if using linear mapping */ - if (revmap_type == IRQ_HOST_MAP_LINEAR) - size += revmap_arg * sizeof(unsigned int); - host = kzalloc(size, GFP_KERNEL); - if (host == NULL) - return NULL; - - /* Fill structure */ - host->revmap_type = revmap_type; - host->inval_irq = inval_irq; - host->ops = ops; - host->of_node = of_node_get(of_node); - - if (host->ops->match == NULL) - host->ops->match = default_irq_host_match; - - raw_spin_lock_irqsave(&irq_big_lock, flags); - - /* If it's a legacy controller, check for duplicates and - * mark it as allocated (we use irq 0 host pointer for that - */ - if (revmap_type == IRQ_HOST_MAP_LEGACY) { - if (irq_map[0].host != NULL) { - raw_spin_unlock_irqrestore(&irq_big_lock, flags); - of_node_put(host->of_node); - kfree(host); - return NULL; - } - irq_map[0].host = host; - } - - list_add(&host->link, &irq_hosts); - raw_spin_unlock_irqrestore(&irq_big_lock, flags); - - /* Additional setups per revmap type */ - switch(revmap_type) { - case IRQ_HOST_MAP_LEGACY: - /* 0 is always the invalid number for legacy */ - host->inval_irq = 0; - /* setup us as the host for all legacy interrupts */ - for (i = 1; i < NUM_ISA_INTERRUPTS; i++) { - irq_map[i].hwirq = i; - smp_wmb(); - irq_map[i].host = host; - smp_wmb(); - - /* Legacy flags are left to default at this point, - * one can then use irq_create_mapping() to - * explicitly change them - */ - ops->map(host, i, i); - - /* Clear norequest flags */ - irq_clear_status_flags(i, IRQ_NOREQUEST); - } - break; - case IRQ_HOST_MAP_LINEAR: - rmap = (unsigned int *)(host + 1); - for (i = 0; i < revmap_arg; i++) - rmap[i] = NO_IRQ; - host->revmap_data.linear.size = revmap_arg; - smp_wmb(); - host->revmap_data.linear.revmap = rmap; - break; - case IRQ_HOST_MAP_TREE: - INIT_RADIX_TREE(&host->revmap_data.tree, GFP_KERNEL); - break; - default: - break; - } - - pr_debug("irq: Allocated host of type %d @0x%p\n", revmap_type, host); - - return host; -} - -struct irq_host *irq_find_host(struct device_node *node) -{ - struct irq_host *h, *found = NULL; - unsigned long flags; - - /* We might want to match the legacy controller last since - * it might potentially be set to match all interrupts in - * the absence of a device node. This isn't a problem so far - * yet though... - */ - raw_spin_lock_irqsave(&irq_big_lock, flags); - list_for_each_entry(h, &irq_hosts, link) - if (h->ops->match(h, node)) { - found = h; - break; - } - raw_spin_unlock_irqrestore(&irq_big_lock, flags); - return found; -} -EXPORT_SYMBOL_GPL(irq_find_host); - -void irq_set_default_host(struct irq_host *host) -{ - pr_debug("irq: Default host set to @0x%p\n", host); - - irq_default_host = host; -} - -void irq_set_virq_count(unsigned int count) -{ - pr_debug("irq: Trying to set virq count to %d\n", count); - - BUG_ON(count < NUM_ISA_INTERRUPTS); - if (count < NR_IRQS) - irq_virq_count = count; -} - -static int irq_setup_virq(struct irq_host *host, unsigned int virq, - irq_hw_number_t hwirq) -{ - int res; - - res = irq_alloc_desc_at(virq, 0); - if (res != virq) { - pr_debug("irq: -> allocating desc failed\n"); - goto error; - } - - /* map it */ - smp_wmb(); - irq_map[virq].hwirq = hwirq; - smp_mb(); - - if (host->ops->map(host, virq, hwirq)) { - pr_debug("irq: -> mapping failed, freeing\n"); - goto errdesc; - } - - irq_clear_status_flags(virq, IRQ_NOREQUEST); - - return 0; - -errdesc: - irq_free_descs(virq, 1); -error: - irq_free_virt(virq, 1); - return -1; -} - -unsigned int irq_create_direct_mapping(struct irq_host *host) -{ - unsigned int virq; - - if (host == NULL) - host = irq_default_host; - - BUG_ON(host == NULL); - WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP); - - virq = irq_alloc_virt(host, 1, 0); - if (virq == NO_IRQ) { - pr_debug("irq: create_direct virq allocation failed\n"); - return NO_IRQ; - } - - pr_debug("irq: create_direct obtained virq %d\n", virq); - - if (irq_setup_virq(host, virq, virq)) - return NO_IRQ; - - return virq; -} - -unsigned int irq_create_mapping(struct irq_host *host, - irq_hw_number_t hwirq) -{ - unsigned int virq, hint; - - pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host, hwirq); - - /* Look for default host if nececssary */ - if (host == NULL) - host = irq_default_host; - if (host == NULL) { - printk(KERN_WARNING "irq_create_mapping called for" - " NULL host, hwirq=%lx\n", hwirq); - WARN_ON(1); - return NO_IRQ; - } - pr_debug("irq: -> using host @%p\n", host); - - /* Check if mapping already exists */ - virq = irq_find_mapping(host, hwirq); - if (virq != NO_IRQ) { - pr_debug("irq: -> existing mapping on virq %d\n", virq); - return virq; - } - - /* Get a virtual interrupt number */ - if (host->revmap_type == IRQ_HOST_MAP_LEGACY) { - /* Handle legacy */ - virq = (unsigned int)hwirq; - if (virq == 0 || virq >= NUM_ISA_INTERRUPTS) - return NO_IRQ; - return virq; - } else { - /* Allocate a virtual interrupt number */ - hint = hwirq % irq_virq_count; - virq = irq_alloc_virt(host, 1, hint); - if (virq == NO_IRQ) { - pr_debug("irq: -> virq allocation failed\n"); - return NO_IRQ; - } - } - - if (irq_setup_virq(host, virq, hwirq)) - return NO_IRQ; - - pr_debug("irq: irq %lu on host %s mapped to virtual irq %u\n", - hwirq, host->of_node ? host->of_node->full_name : "null", virq); - - return virq; -} -EXPORT_SYMBOL_GPL(irq_create_mapping); - -unsigned int irq_create_of_mapping(struct device_node *controller, - const u32 *intspec, unsigned int intsize) -{ - struct irq_host *host; - irq_hw_number_t hwirq; - unsigned int type = IRQ_TYPE_NONE; - unsigned int virq; - - if (controller == NULL) - host = irq_default_host; - else - host = irq_find_host(controller); - if (host == NULL) { - printk(KERN_WARNING "irq: no irq host found for %s !\n", - controller->full_name); - return NO_IRQ; - } - - /* If host has no translation, then we assume interrupt line */ - if (host->ops->xlate == NULL) - hwirq = intspec[0]; - else { - if (host->ops->xlate(host, controller, intspec, intsize, - &hwirq, &type)) - return NO_IRQ; - } - - /* Create mapping */ - virq = irq_create_mapping(host, hwirq); - if (virq == NO_IRQ) - return virq; - - /* Set type if specified and different than the current one */ - if (type != IRQ_TYPE_NONE && - type != (irqd_get_trigger_type(irq_get_irq_data(virq)))) - irq_set_irq_type(virq, type); - return virq; -} -EXPORT_SYMBOL_GPL(irq_create_of_mapping); - -void irq_dispose_mapping(unsigned int virq) -{ - struct irq_host *host; - irq_hw_number_t hwirq; - - if (virq == NO_IRQ) - return; - - host = irq_map[virq].host; - if (WARN_ON(host == NULL)) - return; - - /* Never unmap legacy interrupts */ - if (host->revmap_type == IRQ_HOST_MAP_LEGACY) - return; - - irq_set_status_flags(virq, IRQ_NOREQUEST); - - /* remove chip and handler */ - irq_set_chip_and_handler(virq, NULL, NULL); - - /* Make sure it's completed */ - synchronize_irq(virq); - - /* Tell the PIC about it */ - if (host->ops->unmap) - host->ops->unmap(host, virq); - smp_mb(); - - /* Clear reverse map */ - hwirq = irq_map[virq].hwirq; - switch(host->revmap_type) { - case IRQ_HOST_MAP_LINEAR: - if (hwirq < host->revmap_data.linear.size) - host->revmap_data.linear.revmap[hwirq] = NO_IRQ; - break; - case IRQ_HOST_MAP_TREE: - mutex_lock(&revmap_trees_mutex); - radix_tree_delete(&host->revmap_data.tree, hwirq); - mutex_unlock(&revmap_trees_mutex); - break; - } - - /* Destroy map */ - smp_mb(); - irq_map[virq].hwirq = host->inval_irq; - - irq_free_descs(virq, 1); - /* Free it */ - irq_free_virt(virq, 1); -} -EXPORT_SYMBOL_GPL(irq_dispose_mapping); - -unsigned int irq_find_mapping(struct irq_host *host, - irq_hw_number_t hwirq) -{ - unsigned int i; - unsigned int hint = hwirq % irq_virq_count; - - /* Look for default host if nececssary */ - if (host == NULL) - host = irq_default_host; - if (host == NULL) - return NO_IRQ; - - /* legacy -> bail early */ - if (host->revmap_type == IRQ_HOST_MAP_LEGACY) - return hwirq; - - /* Slow path does a linear search of the map */ - if (hint < NUM_ISA_INTERRUPTS) - hint = NUM_ISA_INTERRUPTS; - i = hint; - do { - if (irq_map[i].host == host && - irq_map[i].hwirq == hwirq) - return i; - i++; - if (i >= irq_virq_count) - i = NUM_ISA_INTERRUPTS; - } while(i != hint); - return NO_IRQ; -} -EXPORT_SYMBOL_GPL(irq_find_mapping); - #ifdef CONFIG_SMP int irq_choose_cpu(const struct cpumask *mask) { @@ -925,232 +535,11 @@ int irq_choose_cpu(const struct cpumask *mask) } #endif -unsigned int irq_radix_revmap_lookup(struct irq_host *host, - irq_hw_number_t hwirq) -{ - struct irq_map_entry *ptr; - unsigned int virq; - - if (WARN_ON_ONCE(host->revmap_type != IRQ_HOST_MAP_TREE)) - return irq_find_mapping(host, hwirq); - - /* - * The ptr returned references the static global irq_map. - * but freeing an irq can delete nodes along the path to - * do t |