irq_domain: Move irq_domain code from powerpc to kernel/irq

This patch only moves the code.  It doesn't make any changes, and the
code is still only compiled for powerpc.  Follow-on patches will generalize
the code for other architectures.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>

3 files changed, 1 insertions, 646 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 1919634a9b32..303703d716fe 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/irq.h b/arch/powerpc/include/asm/irq.h
index f80f262e0597..728cc30d04ea 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -42,155 +42,11 @@ extern atomic_t ppc_n_lost_interrupts;
 /* Same thing, used by the generic IRQ code */
 #define NR_IRQS_LEGACY          NUM_ISA_INTERRUPTS
 
-/*
- * 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_data;
 extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
 extern irq_hw_number_t virq_to_hw(unsigned int virq);
 
 /**
- * irq_alloc_host - Allocate a new irq_domain data structure
- * @of_node: optional device-tree node of the interrupt controller
- * @revmap_type: type of reverse mapping to use
- * @revmap_arg: for IRQ_DOMAIN_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_domain structure. Note that in the case of
- * IRQ_DOMAIN_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_DOMAIN_MAP_LINEAR, the map is allocated by
- * this call as well. For a IRQ_DOMAIN_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_domain *irq_alloc_host(struct device_node *of_node,
-                                       unsigned int revmap_type,
-                                       unsigned int revmap_arg,
-                                       struct irq_domain_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_domain *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_domain *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_domain *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_domain *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_domain *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_domain *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_domain *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_domain *host,
-                                      irq_hw_number_t hwirq);
-
-
-/**
  * irq_early_init - Init irq remapping subsystem
  */
 extern void irq_early_init(void);
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 269fbd5ac62f..e3673ff6b7a0 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -486,17 +486,6 @@ void do_softirq(void)
         local_irq_restore(flags);
 }
 
-
-/*
- * IRQ controller and virtual interrupts
- */
-
-static LIST_HEAD(irq_domain_list);
-static DEFINE_MUTEX(irq_domain_mutex);
-static DEFINE_MUTEX(revmap_trees_mutex);
-static unsigned int irq_virq_count = NR_IRQS;
-static struct irq_domain *irq_default_host;
-
 irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
 {
         return d->hwirq;
@@ -510,362 +499,6 @@ irq_hw_number_t virq_to_hw(unsigned int virq)
 }
 EXPORT_SYMBOL_GPL(virq_to_hw);
 
-static int default_irq_host_match(struct irq_domain *h, struct device_node *np)
-{
-        return h->of_node != NULL && h->of_node == np;
-}
-
-struct irq_domain *irq_alloc_host(struct device_node *of_node,
-                                unsigned int revmap_type,
-                                unsigned int revmap_arg,
-                                struct irq_domain_ops *ops,
-                                irq_hw_number_t inval_irq)
-{
-        struct irq_domain *host, *h;
-        unsigned int size = sizeof(struct irq_domain);
-        unsigned int i;
-        unsigned int *rmap;
-
-        /* Allocate structure and revmap table if using linear mapping */
-        if (revmap_type == IRQ_DOMAIN_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;
-
-        mutex_lock(&irq_domain_mutex);
-        /* Make sure only one legacy controller can be created */
-        if (revmap_type == IRQ_DOMAIN_MAP_LEGACY) {
-                list_for_each_entry(h, &irq_domain_list, link) {
-                        if (WARN_ON(h->revmap_type == IRQ_DOMAIN_MAP_LEGACY)) {
-                                mutex_unlock(&irq_domain_mutex);
-                                of_node_put(host->of_node);
-                                kfree(host);
-                                return NULL;
-                        }
-                }
-        }
-        list_add(&host->link, &irq_domain_list);
-        mutex_unlock(&irq_domain_mutex);
-
-        /* Additional setups per revmap type */
-        switch(revmap_type) {
-        case IRQ_DOMAIN_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++) {
-                        struct irq_data *irq_data = irq_get_irq_data(i);
-                        irq_data->hwirq = i;
-                        irq_data->domain = host;
-
-                        /* 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_DOMAIN_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;
-                host->revmap_data.linear.revmap = rmap;
-                break;
-        case IRQ_DOMAIN_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_domain *irq_find_host(struct device_node *node)
-{
-        struct irq_domain *h, *found = NULL;
-
-        /* 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...
-         */
-        mutex_lock(&irq_domain_mutex);
-        list_for_each_entry(h, &irq_domain_list, link)
-                if (h->ops->match(h, node)) {
-                        found = h;
-                        break;
-                }
-        mutex_unlock(&irq_domain_mutex);
-        return found;
-}
-EXPORT_SYMBOL_GPL(irq_find_host);
-
-void irq_set_default_host(struct irq_domain *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_domain *host, unsigned int virq,
-                            irq_hw_number_t hwirq)
-{
-        struct irq_data *irq_data = irq_get_irq_data(virq);
-
-        irq_data->hwirq = hwirq;
-        irq_data->domain = host;
-        if (host->ops->map(host, virq, hwirq)) {
-                pr_debug("irq: -> mapping failed, freeing\n");
-                irq_data->domain = NULL;
-                irq_data->hwirq = 0;
-                return -1;
-        }
-
-        irq_clear_status_flags(virq, IRQ_NOREQUEST);
-
-        return 0;
-}
-
-unsigned int irq_create_direct_mapping(struct irq_domain *host)
-{
-        unsigned int virq;
-
-        if (host == NULL)
-                host = irq_default_host;
-
-        BUG_ON(host == NULL);
-        WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_NOMAP);
-
-        virq = irq_alloc_desc_from(1, 0);
-        if (virq == NO_IRQ) {
-                pr_debug("irq: create_direct virq allocation failed\n");
-                return NO_IRQ;
-        }
-        if (virq >= irq_virq_count) {
-                pr_err("ERROR: no free irqs available below %i maximum\n",
-                        irq_virq_count);
-                irq_free_desc(virq);
-                return 0;
-        }
-
-        pr_debug("irq: create_direct obtained virq %d\n", virq);
-
-        if (irq_setup_virq(host, virq, virq)) {
-                irq_free_desc(virq);
-                return NO_IRQ;
-        }
-
-        return virq;
-}
-
-unsigned int irq_create_mapping(struct irq_domain *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_DOMAIN_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;
-                if (hint == 0)
-                        hint = 1;
-                virq = irq_alloc_desc_from(hint, 0);
-                if (!virq)
-                        virq = irq_alloc_desc_from(1, 0);
-                if (virq == NO_IRQ) {
-                        pr_debug("irq: -> virq allocation failed\n");
-                        return NO_IRQ;
-                }
-        }
-
-        if (irq_setup_virq(host, virq, hwirq)) {
-                if (host->revmap_type != IRQ_DOMAIN_MAP_LEGACY)
-                        irq_free_desc(virq);
-                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_domain *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_data *irq_data = irq_get_irq_data(virq);
-        struct irq_domain *host;
-        irq_hw_number_t hwirq;
-
-        if (virq == NO_IRQ || !irq_data)
-                return;
-
-        host = irq_data->domain;
-        if (WARN_ON(host == NULL))
-                return;
-
-        /* Never unmap legacy interrupts */
-        if (host->revmap_type == IRQ_DOMAIN_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_data->hwirq;
-        switch(host->revmap_type) {
-        case IRQ_DOMAIN_MAP_LINEAR:
-                if (hwirq < host->revmap_data.linear.size)
-                        host->revmap_data.linear.revmap[hwirq] = NO_IRQ;
-                break;
-        case IRQ_DOMAIN_MAP_TREE:
-                mutex_lock(&revmap_trees_mutex);
-                radix_tree_delete(&host->revmap_data.tree, hwirq);
-                mutex_unlock(&revmap_trees_mutex);
-                break;
-        }
-
-        /* Destroy map */
-        irq_data->hwirq = host->inval_irq;
-
-        irq_free_desc(virq);
-}
-EXPORT_SYMBOL_GPL(irq_dispose_mapping);
-
-unsigned int irq_find_mapping(struct irq_domain *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_DOMAIN_MAP_LEGACY)
-                return hwirq;
-
-        /* Slow path does a linear search of the map */
-        if (hint == 0)
-                hint = 1;
-        i = hint;
-        do {
-                struct irq_data *data = irq_get_irq_data(i);
-                if (data && (data->domain == host) && (data->hwirq == hwirq))
-                        return i;
-                i++;
-                if (i >= irq_virq_count)
-                        i = 1;
-        } while(i != hint);
-        return NO_IRQ;
-}
-EXPORT_SYMBOL_GPL(irq_find_mapping);
-
 #ifdef CONFIG_SMP
 int irq_choose_cpu(const struct cpumask *mask)
 {
@@ -902,146 +535,11 @@ int irq_choose_cpu(const struct cpumask *mask)
 }
 #endif
 
-unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
-                                     irq_hw_number_t hwirq)
-{
-        struct irq_data *irq_data;
-
-        if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
-                return irq_find_mapping(host, hwirq);
-
-        /*
-         * Freeing an irq can delete nodes along the path to
-         * do the lookup via call_rcu.
-         */
-        rcu_read_lock();
-        irq_data = radix_tree_lookup(&host->revmap_data.tree, hwirq);
-        rcu_read_unlock();
-
-        /*
-         * If found in radix tree, then fine.
-         * Else fallback to linear lookup - this should not happen in practice
-         * as it means that we failed to insert the node in the radix tree.
-         */
-        return irq_data ? irq_data->irq : irq_find_mapping(host, hwirq);
-}
-
-void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
-                             irq_hw_number_t hwirq)
-{
-        struct irq_data *irq_data = irq_get_irq_data(virq);
-
-        if (WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
-                return;
-
-        if (virq != NO_IRQ) {
-                mutex_lock(&revmap_trees_mutex);
-                radix_tree_insert(&host->revmap_data.tree, hwirq, irq_data);
-                mutex_unlock(&revmap_trees_mutex);
-        }
-}
-
-unsigned int irq_linear_revmap(struct irq_domain *host,
-                               irq_hw_number_t hwirq)
-{
-        unsigned int *revmap;
-
-        if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_LINEAR))
-                return irq_find_mapping(host, hwirq);
-
-        /* Check revmap bounds */
-        if (unlikely(hwirq >= host->revmap_data.linear.size))
-                return irq_find_mapping(host, hwirq);
-
-        /* Check if revmap was allocated */
-        revmap = host->revmap_data.linear.revmap;
-        if (unlikely(revmap == NULL))
-                return irq_find_mapping(host, hwirq);
-
-        /* Fill up revmap with slow path if no mapping found */
-        if (unlikely(revmap[hwirq] == NO_IRQ))
-                revmap[hwirq] = irq_find_mapping(host, hwirq);
-
-        return revmap[hwirq];
-}
-
 int arch_early_irq_init(void)
 {
         return 0;
 }
 
-#ifdef CONFIG_VIRQ_DEBUG
-static int virq_debug_show(struct seq_file *m, void *private)
-{
-        unsigned long flags;
-        struct irq_desc *desc;
-        const char *p;
-        static const char none[] = "none";
-        void *data;
-        int i;
-
-        seq_printf(m, "%-5s  %-7s  %-15s  %-18s  %s\n", "virq", "hwirq",
-                      "chip name", "chip data", "host name");
-
-        for (i = 1; i < nr_irqs; i++) {
-                desc = irq_to_desc(i);
-                if (!desc)
-                        continue;
-
-                raw_spin_lock_irqsave(&desc->lock, flags);
-
-                if (desc->action && desc->action->handler) {
-                        struct irq_chip *chip;
-
-                        seq_printf(m, "%5d  ", i);
-                        seq_printf(m, "0x%05lx  ", desc->irq_data.hwirq);
-
-                        chip = irq_desc_get_chip(desc);
-                        if (chip && chip->name)
-                                p = chip->name;
-                        else
-                                p = none;
-                        seq_printf(m, "%-15s  ", p);
-
-                        data = irq_desc_get_chip_data(desc);
-                        seq_printf(m, "0x%16p  ", data);
-
-                        if (desc->irq_data.domain->of_node)
-                                p = desc->irq_data.domain->of_node->full_name;
-                        else
-                                p = none;
-                        seq_printf(m, "%s\n", p);
-                }
-
-                raw_spin_unlock_irqrestore(&desc->lock, flags);
-        }
-
-        return 0;
-}
-
-static int virq_debug_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, virq_debug_show, inode->i_private);
-}
-
-static const struct file_operations virq_debug_fops = {
-        .open = virq_debug_open,
-        .read = seq_read,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int __init irq_debugfs_init(void)
-{
-        if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
-                                 NULL, &virq_debug_fops) == NULL)
-                return -ENOMEM;
-
-        return 0;
-}
-__initcall(irq_debugfs_init);
-#endif /* CONFIG_VIRQ_DEBUG */
-
 #ifdef CONFIG_PPC64
 static int __init setup_noirqdistrib(char *str)
 {