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x86/irq: Remove outgoing CPU from vector cleanup mask 

We want to synchronize new vector assignments with a pending cleanup. Remove a
dying cpu from a pending cleanup mask.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Tested-by: Joe Lawrence <joe.lawrence@stratus.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jeremiah Mahler <jmmahler@gmail.com>
Cc: andy.shevchenko@gmail.com
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org #4.3+
Link: http://lkml.kernel.org/r/20151231160107.045961667@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2015-12-31 16:30:52 +00:00
parent 5da0c1217f
commit 56d7d2f4bb
1 changed files with 16 additions and 2 deletions
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18
arch/x86/kernel/apic/vector.c
View File

@ -633,9 +633,23 @@ void irq_complete_move(struct irq_cfg *cfg)
void irq_force_complete_move(int irq)
{
struct irq_cfg *cfg = irq_cfg(irq);
struct apic_chip_data *data;
if (cfg)
__irq_complete_move(cfg, cfg->vector);
if (!cfg)
return;
__irq_complete_move(cfg, cfg->vector);
/*
* Remove this cpu from the cleanup mask. The IPI might have been sent
* just before the cpu was removed from the offline mask, but has not
* been processed because the CPU has interrupts disabled and is on
* the way out.
*/
raw_spin_lock(&vector_lock);
data = container_of(cfg, struct apic_chip_data, cfg);
cpumask_clear_cpu(smp_processor_id(), data->old_domain);
raw_spin_unlock(&vector_lock);
}
#endif