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x86, irq: Simplify arch_early_irq_init()

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Simplify function arch_early_irq_init() and kill static array irq_cfgx[].

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1402302011-23642-21-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu 2014-06-09 16:19:49 +08:00 committed by Thomas Gleixner
parent 95d76acc75
commit 4b92b4f754
1 changed files with 11 additions and 22 deletions
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33
arch/x86/kernel/apic/io_apic.c
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@ -183,6 +183,7 @@ early_param("noapic", parse_noapic);
static int io_apic_setup_irq_pin(unsigned int irq, int node,
struct io_apic_irq_attr *attr);
static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node);
/* Will be called in mpparse/acpi/sfi codes for saving IRQ info */
void mp_save_irq(struct mpc_intsrc *m)
@ -214,14 +215,10 @@ static struct irq_pin_list *alloc_irq_pin_list(int node)
return kzalloc_node(sizeof(struct irq_pin_list), GFP_KERNEL, node);
}
/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];
int __init arch_early_irq_init(void)
{
struct irq_cfg *cfg;
int count, node, i;
int i, node = cpu_to_node(0);
if (!nr_legacy_irqs())
io_apic_irqs = ~0UL;
@ -234,22 +231,14 @@ int __init arch_early_irq_init(void)
pr_err("IOAPIC %d: suspend/resume impossible!\n", i);
}
cfg = irq_cfgx;
count = ARRAY_SIZE(irq_cfgx);
node = cpu_to_node(0);
for (i = 0; i < count; i++) {
irq_set_chip_data(i, &cfg[i]);
zalloc_cpumask_var_node(&cfg[i].domain, GFP_KERNEL, node);
zalloc_cpumask_var_node(&cfg[i].old_domain, GFP_KERNEL, node);
/*
* For legacy IRQ's, start with assigning irq0 to irq15 to
* IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
*/
if (i < nr_legacy_irqs()) {
cfg[i].vector = IRQ0_VECTOR + i;
cpumask_setall(cfg[i].domain);
}
/*
* For legacy IRQ's, start with assigning irq0 to irq15 to
* IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
*/
for (i = 0; i < nr_legacy_irqs(); i++) {
cfg = alloc_irq_and_cfg_at(i, node);
cfg->vector = IRQ0_VECTOR + i;
cpumask_setall(cfg->domain);
}
return 0;
@ -3377,7 +3366,7 @@ int __init arch_probe_nr_irqs(void)
if (nr < nr_irqs)
nr_irqs = nr;
return nr_legacy_irqs();
return 0;
}
int io_apic_set_pci_routing(struct device *dev, int irq,