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authorYinghai Lu <yhlu.kernel@gmail.com>2008-08-19 20:50:05 -0700
committerIngo Molnar <mingo@elte.hu>2008-10-16 16:52:29 +0200
commit08678b0841267c1d00d771fe01548d86043d065e (patch)
tree7debb21f9e9a768ced43077f7376797a0c46f8c0 /kernel/irq/proc.c
parentbfea1238beac9d306eeac081c67de5ca6aec4c7a (diff)
downloadlinux-08678b0841267c1d00d771fe01548d86043d065e.tar.bz2
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.c36
1 files changed, 19 insertions, 17 deletions
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index e5225a65a4f9..c2f356c808f6 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)