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author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-08-20 03:50:05 (GMT) |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-10-16 14:52:29 (GMT) |
commit | 08678b0841267c1d00d771fe01548d86043d065e (patch) | |
tree | 7debb21f9e9a768ced43077f7376797a0c46f8c0 /kernel/irq/proc.c | |
parent | bfea1238beac9d306eeac081c67de5ca6aec4c7a (diff) | |
download | linux-fsl-qoriq-08678b0841267c1d00d771fe01548d86043d065e.tar.xz |
generic: sparse irqs: use irq_desc() together with dyn_array, instead of irq_desc[]
add CONFIG_HAVE_SPARSE_IRQ to for use condensed array.
Get rid of irq_desc[] array assumptions.
Preallocate 32 irq_desc, and irq_desc() will try to get more.
( No change in functionality is expected anywhere, except the odd build
failure where we missed a code site or where a crossing commit itroduces
new irq_desc[] usage. )
v2: according to Eric, change get_irq_desc() to irq_desc()
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq/proc.c')
-rw-r--r-- | kernel/irq/proc.c | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index e5225a6..c2f356c 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -19,7 +19,7 @@ static struct proc_dir_entry *root_irq_dir; static int irq_affinity_proc_show(struct seq_file *m, void *v) { - struct irq_desc *desc = irq_desc + (long)m->private; + struct irq_desc *desc = irq_to_desc((long)m->private); cpumask_t *mask = &desc->affinity; #ifdef CONFIG_GENERIC_PENDING_IRQ @@ -43,7 +43,7 @@ static ssize_t irq_affinity_proc_write(struct file *file, cpumask_t new_value; int err; - if (!irq_desc[irq].chip->set_affinity || no_irq_affinity || + if (!irq_to_desc(irq)->chip->set_affinity || no_irq_affinity || irq_balancing_disabled(irq)) return -EIO; @@ -132,20 +132,20 @@ static const struct file_operations default_affinity_proc_fops = { static int irq_spurious_read(char *page, char **start, off_t off, int count, int *eof, void *data) { - struct irq_desc *d = &irq_desc[(long) data]; + struct irq_desc *desc = irq_to_desc((long) data); return sprintf(page, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n", - d->irq_count, - d->irqs_unhandled, - jiffies_to_msecs(d->last_unhandled)); + desc->irq_count, + desc->irqs_unhandled, + jiffies_to_msecs(desc->last_unhandled)); } #define MAX_NAMELEN 128 static int name_unique(unsigned int irq, struct irqaction *new_action) { - struct irq_desc *desc = irq_desc + irq; + struct irq_desc *desc = irq_to_desc(irq); struct irqaction *action; unsigned long flags; int ret = 1; @@ -165,8 +165,9 @@ static int name_unique(unsigned int irq, struct irqaction *new_action) void register_handler_proc(unsigned int irq, struct irqaction *action) { char name [MAX_NAMELEN]; + struct irq_desc *desc = irq_to_desc(irq); - if (!irq_desc[irq].dir || action->dir || !action->name || + if (!desc->dir || action->dir || !action->name || !name_unique(irq, action)) return; @@ -174,7 +175,7 @@ void register_handler_proc(unsigned int irq, struct irqaction *action) snprintf(name, MAX_NAMELEN, "%s", action->name); /* create /proc/irq/1234/handler/ */ - action->dir = proc_mkdir(name, irq_desc[irq].dir); + action->dir = proc_mkdir(name, desc->dir); } #undef MAX_NAMELEN @@ -185,25 +186,24 @@ void register_irq_proc(unsigned int irq) { char name [MAX_NAMELEN]; struct proc_dir_entry *entry; + struct irq_desc *desc = irq_to_desc(irq); - if (!root_irq_dir || - (irq_desc[irq].chip == &no_irq_chip) || - irq_desc[irq].dir) + if (!root_irq_dir || (desc->chip == &no_irq_chip) || desc->dir) return; memset(name, 0, MAX_NAMELEN); sprintf(name, "%d", irq); /* create /proc/irq/1234 */ - irq_desc[irq].dir = proc_mkdir(name, root_irq_dir); + desc->dir = proc_mkdir(name, root_irq_dir); #ifdef CONFIG_SMP /* create /proc/irq/<irq>/smp_affinity */ - proc_create_data("smp_affinity", 0600, irq_desc[irq].dir, + proc_create_data("smp_affinity", 0600, desc->dir, &irq_affinity_proc_fops, (void *)(long)irq); #endif - entry = create_proc_entry("spurious", 0444, irq_desc[irq].dir); + entry = create_proc_entry("spurious", 0444, desc->dir); if (entry) { entry->data = (void *)(long)irq; entry->read_proc = irq_spurious_read; @@ -214,8 +214,10 @@ void register_irq_proc(unsigned int irq) void unregister_handler_proc(unsigned int irq, struct irqaction *action) { - if (action->dir) - remove_proc_entry(action->dir->name, irq_desc[irq].dir); + if (action->dir) { + struct irq_desc *desc = irq_to_desc(irq); + remove_proc_entry(action->dir->name, desc->dir); + } } void register_default_affinity_proc(void) |