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[PATCH] genirq: x86_64 irq: Reenable migrating irqs to other cpus

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In the latest changes the code for migrating x86_64 irqs was dropped.  This
reads it in a fashion that will work even if we change the vector on level
triggered irqs when we migrate them.

[akpm@osdl.org: build fix]
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rajesh Shah <rajesh.shah@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric W. Biederman 2006-10-04 02:16:30 -07:00 committed by Linus Torvalds
parent e7b946e98a
commit 0be6652f1e
1 changed files with 33 additions and 3 deletions
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36
arch/x86_64/kernel/io_apic.c
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@ -1254,18 +1254,48 @@ static int ioapic_retrigger_vector(unsigned int vector)
* races.
*/
static void ack_apic(unsigned int vector)
static void ack_apic(unsigned int irq)
{
ack_APIC_irq();
}
static void ack_apic_edge(unsigned int irq)
{
move_native_irq(irq);
ack_APIC_irq();
}
static void ack_apic_level(unsigned int irq)
{
int do_unmask_irq = 0;
#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
/* If we are moving the irq we need to mask it */
if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
do_unmask_irq = 1;
mask_IO_APIC_irq(irq);
}
#endif
/*
* We must acknowledge the irq before we move it or the acknowledge will
* not propogate properly.
*/
ack_APIC_irq();
/* Now we can move and renable the irq */
move_masked_irq(irq);
if (unlikely(do_unmask_irq))
unmask_IO_APIC_irq(irq);
}
static struct irq_chip ioapic_chip __read_mostly = {
.name = "IO-APIC",
.startup = startup_ioapic_vector,
.mask = mask_ioapic_vector,
.unmask = unmask_ioapic_vector,
.ack = ack_apic,
.eoi = ack_apic,
.ack = ack_apic_edge,
.eoi = ack_apic_level,
#ifdef CONFIG_SMP
.set_affinity = set_ioapic_affinity_vector,
#endif