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x86/irq: Standardize on CONFIG_SPARSE_IRQ=y

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Sparseirq got introduced in v2.6.28 and Thomas did a huge cleanup
around v2.6.38 that eliminated basically all disadvantages
of it.

So we can remove non-sparseirq support now and simplify
our IRQ degrees of freedom a bit.

Suggested-and-acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/4E95E21D.6090200@oracle.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2011-10-12 11:53:17 -07:00 committed by Ingo Molnar
parent 6f50d45fae
commit 141d55e6cc
3 changed files with 3 additions and 33 deletions
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1
arch/x86/Kconfig
View File

@ -64,6 +64,7 @@ config X86
select HAVE_TEXT_POKE_SMP
select HAVE_GENERIC_HARDIRQS
select HAVE_SPARSE_IRQ
select SPARSE_IRQ
select GENERIC_FIND_FIRST_BIT
select GENERIC_IRQ_PROBE
select GENERIC_PENDING_IRQ if SMP

12
arch/x86/include/asm/irq_vectors.h
View File

@ -160,19 +160,11 @@ static inline int invalid_vm86_irq(int irq)
#define IO_APIC_VECTOR_LIMIT ( 32 * MAX_IO_APICS )
#ifdef CONFIG_X86_IO_APIC
# ifdef CONFIG_SPARSE_IRQ
# define CPU_VECTOR_LIMIT (64 * NR_CPUS)
# define NR_IRQS \
# define CPU_VECTOR_LIMIT (64 * NR_CPUS)
# define NR_IRQS \
(CPU_VECTOR_LIMIT > IO_APIC_VECTOR_LIMIT ? \
(NR_VECTORS + CPU_VECTOR_LIMIT) : \
(NR_VECTORS + IO_APIC_VECTOR_LIMIT))
# else
# define CPU_VECTOR_LIMIT (32 * NR_CPUS)
# define NR_IRQS \
(CPU_VECTOR_LIMIT < IO_APIC_VECTOR_LIMIT ? \
(NR_VECTORS + CPU_VECTOR_LIMIT) : \
(NR_VECTORS + IO_APIC_VECTOR_LIMIT))
# endif
#else /* !CONFIG_X86_IO_APIC: */
# define NR_IRQS NR_IRQS_LEGACY
#endif

23
arch/x86/kernel/apic/io_apic.c
View File

@ -186,11 +186,7 @@ static struct irq_pin_list *alloc_irq_pin_list(int node)
/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
#ifdef CONFIG_SPARSE_IRQ
static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];
#else
static struct irq_cfg irq_cfgx[NR_IRQS];
#endif
int __init arch_early_irq_init(void)
{
@ -234,7 +230,6 @@ int __init arch_early_irq_init(void)
return 0;
}
#ifdef CONFIG_SPARSE_IRQ
static struct irq_cfg *irq_cfg(unsigned int irq)
{
return irq_get_chip_data(irq);
@ -269,22 +264,6 @@ static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg)
kfree(cfg);
}
#else
struct irq_cfg *irq_cfg(unsigned int irq)
{
return irq < nr_irqs ? irq_cfgx + irq : NULL;
}
static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node)
{
return irq_cfgx + irq;
}
static inline void free_irq_cfg(unsigned int at, struct irq_cfg *cfg) { }
#endif
static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node)
{
int res = irq_alloc_desc_at(at, node);
@ -3644,7 +3623,6 @@ int get_nr_irqs_gsi(void)
return nr_irqs_gsi;
}
#ifdef CONFIG_SPARSE_IRQ
int __init arch_probe_nr_irqs(void)
{
int nr;
@ -3664,7 +3642,6 @@ int __init arch_probe_nr_irqs(void)
return NR_IRQS_LEGACY;
}
#endif
int io_apic_set_pci_routing(struct device *dev, int irq,
struct io_apic_irq_attr *irq_attr)