/* * linux/kernel/irq/proc.c * * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar * * This file contains the /proc/irq/ handling code. */ #include <linux/irq.h>#include <linux/gfp.h>#include <linux/proc_fs.h>#include <linux/seq_file.h>#include <linux/interrupt.h>#include <linux/kernel_stat.h>#include <linux/mutex.h> #include "internals.h" /* * Access rules: * * procfs protects read/write of /proc/irq/N/ files against a * concurrent free of the interrupt descriptor. remove_proc_entry() * immediately prevents new read/writes to happen and waits for * already running read/write functions to complete. * * We remove the proc entries first and then delete the interrupt * descriptor from the radix tree and free it. So it is guaranteed * that irq_to_desc(N) is valid as long as the read/writes are * permitted by procfs. * * The read from /proc/interrupts is a different problem because there * is no protection. So the lookup and the access to irqdesc * information must be protected by sparse_irq_lock. */static struct proc_dir_entry *root_irq_dir; #ifdef CONFIG_SMP enum { AFFINITY, AFFINITY_LIST, EFFECTIVE, EFFECTIVE_LIST,}; static int show_irq_affinity(int type, struct seq_file *m){ struct irq_desc *desc = irq_to_desc((long)m->private); const struct cpumask *mask; switch (type) { case AFFINITY: case AFFINITY_LIST: mask = desc->irq_common_data.affinity;#ifdef CONFIG_GENERIC_PENDING_IRQ if (irqd_is_setaffinity_pending(&desc->irq_data)) mask = desc->pending_mask;#endif break; case EFFECTIVE: case EFFECTIVE_LIST:#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK mask = desc->irq_common_data.effective_affinity; break;#else return -EINVAL;#endif }; switch (type) { case AFFINITY_LIST: case EFFECTIVE_LIST: seq_printf(m, "%*pbl\n", cpumask_pr_args(mask)); break; case AFFINITY: case EFFECTIVE: seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); break; } return 0;} static int irq_affinity_hint_proc_show(struct seq_file *m, void *v){ struct irq_desc *desc = irq_to_desc((long)m->private); unsigned long flags; cpumask_var_t mask; if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; raw_spin_lock_irqsave(&desc->lock, flags); if (desc->affinity_hint) cpumask_copy(mask, desc->affinity_hint); raw_spin_unlock_irqrestore(&desc->lock, flags); seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); free_cpumask_var(mask); return 0;} #ifndef is_affinity_mask_valid#define is_affinity_mask_valid(val) 1#endif int no_irq_affinity;static int irq_affinity_proc_show(struct seq_file *m, void *v){ return show_irq_affinity(AFFINITY, m);} static int irq_affinity_list_proc_show(struct seq_file *m, void *v){ return show_irq_affinity(AFFINITY_LIST, m);} static ssize_t write_irq_affinity(int type, struct file *file, const char __user *buffer, size_t count, loff_t *pos){ unsigned int irq = (int)(long)PDE_DATA(file_inode(file)); cpumask_var_t new_value; int err; if (!irq_can_set_affinity_usr(irq) || no_irq_affinity) return -EIO; if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) return -ENOMEM; if (type) err = cpumask_parselist_user(buffer, count, new_value); else err = cpumask_parse_user(buffer, count, new_value); if (err) goto free_cpumask; if (!is_affinity_mask_valid(new_value)) { err = -EINVAL; goto free_cpumask; } /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least * one online CPU still has to be targeted. */ if (!cpumask_intersects(new_value, cpu_online_mask)) { /* * Special case for empty set - allow the architecture code * to set default SMP affinity. */ err = irq_select_affinity_usr(irq) ? -EINVAL : count; } else { irq_set_affinity(irq, new_value); err = count; } free_cpumask: free_cpumask_var(new_value); return err;} static ssize_t irq_affinity_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *pos){ return write_irq_affinity(0, file, buffer, count, pos);} static ssize_t irq_affinity_list_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *pos){ return write_irq_affinity(1, file, buffer, count, pos);} static int irq_affinity_proc_open(struct inode *inode, struct file *file){ return single_open(file, irq_affinity_proc_show, PDE_DATA(inode));} static int irq_affinity_list_proc_open(struct inode *inode, struct file *file){ return single_open(file, irq_affinity_list_proc_show, PDE_DATA(inode));} static int irq_affinity_hint_proc_open(struct inode *inode, struct file *file){ return single_open(file, irq_affinity_hint_proc_show, PDE_DATA(inode));} static const struct file_operations irq_affinity_proc_fops = { .open = irq_affinity_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = irq_affinity_proc_write,}; static const struct file_operations irq_affinity_hint_proc_fops = { .open = irq_affinity_hint_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release,}; static const struct file_operations irq_affinity_list_proc_fops = { .open = irq_affinity_list_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = irq_affinity_list_proc_write,}; #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASKstatic int irq_effective_aff_proc_show(struct seq_file *m, void *v){ return show_irq_affinity(EFFECTIVE, m);} static int irq_effective_aff_list_proc_show(struct seq_file *m, void *v){ return show_irq_affinity(EFFECTIVE_LIST, m);} static int irq_effective_aff_proc_open(struct inode *inode, struct file *file){ return single_open(file, irq_effective_aff_proc_show, PDE_DATA(inode));} static int irq_effective_aff_list_proc_open(struct inode *inode, struct file *file){ return single_open(file, irq_effective_aff_list_proc_show, PDE_DATA(inode));} static const struct file_operations irq_effective_aff_proc_fops = { .open = irq_effective_aff_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release,}; static const struct file_operations irq_effective_aff_list_proc_fops = { .open = irq_effective_aff_list_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release,};#endif static int default_affinity_show(struct seq_file *m, void *v){ seq_printf(m, "%*pb\n", cpumask_pr_args(irq_default_affinity)); return 0;} static ssize_t default_affinity_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos){ cpumask_var_t new_value; int err; if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) return -ENOMEM; err = cpumask_parse_user(buffer, count, new_value); if (err) goto out; if (!is_affinity_mask_valid(new_value)) { err = -EINVAL; goto out; } /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least * one online CPU still has to be targeted. */ if (!cpumask_intersects(new_value, cpu_online_mask)) { err = -EINVAL; goto out; } cpumask_copy(irq_default_affinity, new_value); err = count; out: free_cpumask_var(new_value); return err;} static int default_affinity_open(struct inode *inode, struct file *file){ return single_open(file, default_affinity_show, PDE_DATA(inode));} static const struct file_operations default_affinity_proc_fops = { .open = default_affinity_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = default_affinity_write,}; static int irq_node_proc_show(struct seq_file *m, void *v){ struct irq_desc *desc = irq_to_desc((long) m->private); seq_printf(m, "%d\n", irq_desc_get_node(desc)); return 0;} static int irq_node_proc_open(struct inode *inode, struct file *file){ return single_open(file, irq_node_proc_show, PDE_DATA(inode));} static const struct file_operations irq_node_proc_fops = { .open = irq_node_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release,};#endif static int irq_spurious_proc_show(struct seq_file *m, void *v){ struct irq_desc *desc = irq_to_desc((long) m->private); seq_printf(m, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n", desc->irq_count, desc->irqs_unhandled, jiffies_to_msecs(desc->last_unhandled)); return 0;} static int irq_spurious_proc_open(struct inode *inode, struct file *file){ return single_open(file, irq_spurious_proc_show, PDE_DATA(inode));} static const struct file_operations irq_spurious_proc_fops = { .open = irq_spurious_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release,}; #define MAX_NAMELEN 128 static int name_unique(unsigned int irq, struct irqaction *new_action){ struct irq_desc *desc = irq_to_desc(irq); struct irqaction *action; unsigned long flags; int ret = 1; raw_spin_lock_irqsave(&desc->lock, flags); for_each_action_of_desc(desc, action) { if ((action != new_action) && action->name && !strcmp(new_action->name, action->name)) { ret = 0; break; } } raw_spin_unlock_irqrestore(&desc->lock, flags); return ret;} void register_handler_proc(unsigned int irq, struct irqaction *action){ char name [MAX_NAMELEN]; struct irq_desc *desc = irq_to_desc(irq); if (!desc->dir || action->dir || !action->name || !name_unique(irq, action)) return; snprintf(name, MAX_NAMELEN, "%s", action->name); /* create /proc/irq/1234/handler/ */ action->dir = proc_mkdir(name, desc->dir);} #undef MAX_NAMELEN #define MAX_NAMELEN 10 void register_irq_proc(unsigned int irq, struct irq_desc *desc){ static DEFINE_MUTEX(register_lock); void __maybe_unused *irqp = (void *)(unsigned long) irq; char name [MAX_NAMELEN]; if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip)) return; /* * irq directories are registered only when a handler is * added, not when the descriptor is created, so multiple * tasks might try to register at the same time. */ mutex_lock(®ister_lock); if (desc->dir) goto out_unlock; sprintf(name, "%d", irq); /* create /proc/irq/1234 */ desc->dir = proc_mkdir(name, root_irq_dir); if (!desc->dir) goto out_unlock; #ifdef CONFIG_SMP /* create /proc/irq/<irq>/smp_affinity */ proc_create_data("smp_affinity", 0644, desc->dir, &irq_affinity_proc_fops, irqp); /* create /proc/irq/<irq>/affinity_hint */ proc_create_data("affinity_hint", 0444, desc->dir, &irq_affinity_hint_proc_fops, irqp); /* create /proc/irq/<irq>/smp_affinity_list */ proc_create_data("smp_affinity_list", 0644, desc->dir, &irq_affinity_list_proc_fops, irqp); proc_create_data("node", 0444, desc->dir, &irq_node_proc_fops, irqp);# ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK proc_create_data("effective_affinity", 0444, desc->dir, &irq_effective_aff_proc_fops, irqp); proc_create_data("effective_affinity_list", 0444, desc->dir, &irq_effective_aff_list_proc_fops, irqp);# endif#endif proc_create_data("spurious", 0444, desc->dir, &irq_spurious_proc_fops, (void *)(long)irq); out_unlock: mutex_unlock(®ister_lock);} void unregister_irq_proc(unsigned int irq, struct irq_desc *desc){ char name [MAX_NAMELEN]; if (!root_irq_dir || !desc->dir) return;#ifdef CONFIG_SMP remove_proc_entry("smp_affinity", desc->dir); remove_proc_entry("affinity_hint", desc->dir); remove_proc_entry("smp_affinity_list", desc->dir); remove_proc_entry("node", desc->dir);# ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK remove_proc_entry("effective_affinity", desc->dir); remove_proc_entry("effective_affinity_list", desc->dir);# endif#endif remove_proc_entry("spurious", desc->dir); sprintf(name, "%u", irq); remove_proc_entry(name, root_irq_dir);} #undef MAX_NAMELEN void unregister_handler_proc(unsigned int irq, struct irqaction *action){ proc_remove(action->dir);} static void register_default_affinity_proc(void){#ifdef CONFIG_SMP proc_create("irq/default_smp_affinity", 0644, NULL, &default_affinity_proc_fops);#endif} void init_irq_proc(void){ unsigned int irq; struct irq_desc *desc; /* create /proc/irq */ root_irq_dir = proc_mkdir("irq", NULL); if (!root_irq_dir) return; register_default_affinity_proc(); /* * Create entries for all existing IRQs. */ for_each_irq_desc(irq, desc) register_irq_proc(irq, desc);Lines 1–500 of 589. 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/* * linux/kernel/irq/proc.c * * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar * * This file contains the /proc/irq/ handling code. */ #include <linux/irq.h> #include <linux/gfp.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/interrupt.h> #include <linux/kernel_stat.h> #include <linux/mutex.h> #include "internals.h" /* * Access rules: * * procfs protects read/write of /proc/irq/N/ files against a * concurrent free of the interrupt descriptor. remove_proc_entry() * immediately prevents new read/writes to happen and waits for * already running read/write functions to complete. * * We remove the proc entries first and then delete the interrupt * descriptor from the radix tree and free it. So it is guaranteed * that irq_to_desc(N) is valid as long as the read/writes are * permitted by procfs. * * The read from /proc/interrupts is a different problem because there * is no protection. So the lookup and the access to irqdesc * information must be protected by sparse_irq_lock. */ static struct proc_dir_entry *root_irq_dir; #ifdef CONFIG_SMP enum { AFFINITY, AFFINITY_LIST, EFFECTIVE, EFFECTIVE_LIST, }; static int show_irq_affinity(int type, struct seq_file *m) { struct irq_desc *desc = irq_to_desc((long)m->private); const struct cpumask *mask; switch (type) { case AFFINITY: case AFFINITY_LIST: mask = desc->irq_common_data.affinity; #ifdef CONFIG_GENERIC_PENDING_IRQ if (irqd_is_setaffinity_pending(&desc->irq_data)) mask = desc->pending_mask; #endif break; case EFFECTIVE: case EFFECTIVE_LIST: #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK mask = desc->irq_common_data.effective_affinity; break; #else return -EINVAL; #endif }; switch (type) { case AFFINITY_LIST: case EFFECTIVE_LIST: seq_printf(m, "%*pbl\n", cpumask_pr_args(mask)); break; case AFFINITY: case EFFECTIVE: seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); break; } return 0; } static int irq_affinity_hint_proc_show(struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long)m->private); unsigned long flags; cpumask_var_t mask; if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; raw_spin_lock_irqsave(&desc->lock, flags); if (desc->affinity_hint) cpumask_copy(mask, desc->affinity_hint); raw_spin_unlock_irqrestore(&desc->lock, flags); seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); free_cpumask_var(mask); return 0; } #ifndef is_affinity_mask_valid #define is_affinity_mask_valid(val) 1 #endif int no_irq_affinity; static int irq_affinity_proc_show(struct seq_file *m, void *v) { return show_irq_affinity(AFFINITY, m); } static int irq_affinity_list_proc_show(struct seq_file *m, void *v) { return show_irq_affinity(AFFINITY_LIST, m); } static ssize_t write_irq_affinity(int type, struct file *file, const char __user *buffer, size_t count, loff_t *pos) { unsigned int irq = (int)(long)PDE_DATA(file_inode(file)); cpumask_var_t new_value; int err; if (!irq_can_set_affinity_usr(irq) || no_irq_affinity) return -EIO; if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) return -ENOMEM; if (type) err = cpumask_parselist_user(buffer, count, new_value); else err = cpumask_parse_user(buffer, count, new_value); if (err) goto free_cpumask; if (!is_affinity_mask_valid(new_value)) { err = -EINVAL; goto free_cpumask; } /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least * one online CPU still has to be targeted. */ if (!cpumask_intersects(new_value, cpu_online_mask)) { /* * Special case for empty set - allow the architecture code * to set default SMP affinity. */ err = irq_select_affinity_usr(irq) ? -EINVAL : count; } else { irq_set_affinity(irq, new_value); err = count; } free_cpumask: free_cpumask_var(new_value); return err; } static ssize_t irq_affinity_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { return write_irq_affinity(0, file, buffer, count, pos); } static ssize_t irq_affinity_list_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { return write_irq_affinity(1, file, buffer, count, pos); } static int irq_affinity_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_affinity_proc_show, PDE_DATA(inode)); } static int irq_affinity_list_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_affinity_list_proc_show, PDE_DATA(inode)); } static int irq_affinity_hint_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_affinity_hint_proc_show, PDE_DATA(inode)); } static const struct file_operations irq_affinity_proc_fops = { .open = irq_affinity_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = irq_affinity_proc_write, }; static const struct file_operations irq_affinity_hint_proc_fops = { .open = irq_affinity_hint_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static const struct file_operations irq_affinity_list_proc_fops = { .open = irq_affinity_list_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = irq_affinity_list_proc_write, }; #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK static int irq_effective_aff_proc_show(struct seq_file *m, void *v) { return show_irq_affinity(EFFECTIVE, m); } static int irq_effective_aff_list_proc_show(struct seq_file *m, void *v) { return show_irq_affinity(EFFECTIVE_LIST, m); } static int irq_effective_aff_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_effective_aff_proc_show, PDE_DATA(inode)); } static int irq_effective_aff_list_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_effective_aff_list_proc_show, PDE_DATA(inode)); } static const struct file_operations irq_effective_aff_proc_fops = { .open = irq_effective_aff_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static const struct file_operations irq_effective_aff_list_proc_fops = { .open = irq_effective_aff_list_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; #endif static int default_affinity_show(struct seq_file *m, void *v) { seq_printf(m, "%*pb\n", cpumask_pr_args(irq_default_affinity)); return 0; } static ssize_t default_affinity_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { cpumask_var_t new_value; int err; if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) return -ENOMEM; err = cpumask_parse_user(buffer, count, new_value); if (err) goto out; if (!is_affinity_mask_valid(new_value)) { err = -EINVAL; goto out; } /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least * one online CPU still has to be targeted. */ if (!cpumask_intersects(new_value, cpu_online_mask)) { err = -EINVAL; goto out; } cpumask_copy(irq_default_affinity, new_value); err = count; out: free_cpumask_var(new_value); return err; } static int default_affinity_open(struct inode *inode, struct file *file) { return single_open(file, default_affinity_show, PDE_DATA(inode)); } static const struct file_operations default_affinity_proc_fops = { .open = default_affinity_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = default_affinity_write, }; static int irq_node_proc_show(struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long) m->private); seq_printf(m, "%d\n", irq_desc_get_node(desc)); return 0; } static int irq_node_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_node_proc_show, PDE_DATA(inode)); } static const struct file_operations irq_node_proc_fops = { .open = irq_node_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; #endif static int irq_spurious_proc_show(struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long) m->private); seq_printf(m, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n", desc->irq_count, desc->irqs_unhandled, jiffies_to_msecs(desc->last_unhandled)); return 0; } static int irq_spurious_proc_open(struct inode *inode, struct file *file) { return single_open(file, irq_spurious_proc_show, PDE_DATA(inode)); } static const struct file_operations irq_spurious_proc_fops = { .open = irq_spurious_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; #define MAX_NAMELEN 128 static int name_unique(unsigned int irq, struct irqaction *new_action) { struct irq_desc *desc = irq_to_desc(irq); struct irqaction *action; unsigned long flags; int ret = 1; raw_spin_lock_irqsave(&desc->lock, flags); for_each_action_of_desc(desc, action) { if ((action != new_action) && action->name && !strcmp(new_action->name, action->name)) { ret = 0; break; } } raw_spin_unlock_irqrestore(&desc->lock, flags); return ret; } void register_handler_proc(unsigned int irq, struct irqaction *action) { char name [MAX_NAMELEN]; struct irq_desc *desc = irq_to_desc(irq); if (!desc->dir || action->dir || !action->name || !name_unique(irq, action)) return; snprintf(name, MAX_NAMELEN, "%s", action->name); /* create /proc/irq/1234/handler/ */ action->dir = proc_mkdir(name, desc->dir); } #undef MAX_NAMELEN #define MAX_NAMELEN 10 void register_irq_proc(unsigned int irq, struct irq_desc *desc) { static DEFINE_MUTEX(register_lock); void __maybe_unused *irqp = (void *)(unsigned long) irq; char name [MAX_NAMELEN]; if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip)) return; /* * irq directories are registered only when a handler is * added, not when the descriptor is created, so multiple * tasks might try to register at the same time. */ mutex_lock(®ister_lock); if (desc->dir) goto out_unlock; sprintf(name, "%d", irq); /* create /proc/irq/1234 */ desc->dir = proc_mkdir(name, root_irq_dir); if (!desc->dir) goto out_unlock; #ifdef CONFIG_SMP /* create /proc/irq/<irq>/smp_affinity */ proc_create_data("smp_affinity", 0644, desc->dir, &irq_affinity_proc_fops, irqp); /* create /proc/irq/<irq>/affinity_hint */ proc_create_data("affinity_hint", 0444, desc->dir, &irq_affinity_hint_proc_fops, irqp); /* create /proc/irq/<irq>/smp_affinity_list */ proc_create_data("smp_affinity_list", 0644, desc->dir, &irq_affinity_list_proc_fops, irqp); proc_create_data("node", 0444, desc->dir, &irq_node_proc_fops, irqp); # ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK proc_create_data("effective_affinity", 0444, desc->dir, &irq_effective_aff_proc_fops, irqp); proc_create_data("effective_affinity_list", 0444, desc->dir, &irq_effective_aff_list_proc_fops, irqp); # endif #endif proc_create_data("spurious", 0444, desc->dir, &irq_spurious_proc_fops, (void *)(long)irq); out_unlock: mutex_unlock(®ister_lock); } void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { char name [MAX_NAMELEN]; if (!root_irq_dir || !desc->dir) return; #ifdef CONFIG_SMP remove_proc_entry("smp_affinity", desc->dir); remove_proc_entry("affinity_hint", desc->dir); remove_proc_entry("smp_affinity_list", desc->dir); remove_proc_entry("node", desc->dir); # ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK remove_proc_entry("effective_affinity", desc->dir); remove_proc_entry("effective_affinity_list", desc->dir); # endif #endif remove_proc_entry("spurious", desc->dir); sprintf(name, "%u", irq); remove_proc_entry(name, root_irq_dir); } #undef MAX_NAMELEN void unregister_handler_proc(unsigned int irq, struct irqaction *action) { proc_remove(action->dir); } static void register_default_affinity_proc(void) { #ifdef CONFIG_SMP proc_create("irq/default_smp_affinity", 0644, NULL, &default_affinity_proc_fops); #endif } void init_irq_proc(void) { unsigned int irq; struct irq_desc *desc; /* create /proc/irq */ root_irq_dir = proc_mkdir("irq", NULL); if (!root_irq_dir) return; register_default_affinity_proc(); /* * Create entries for all existing IRQs. */ for_each_irq_desc(irq, desc) register_irq_proc(irq, desc);