irqchip/gic-v3-its: Move pending table allocation to init time

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Pending tables for the redistributors are currently allocated
one at a time as each CPU boots. This is causing some grief
for Linux/RT (allocation from within a CPU hotplug notifier is
frown upon).

Let's move this allocation to take place at init time, when we
only have a single CPU. It means we're allocating memory for CPUs
that are not online yet, but most system will boot all of their
CPUs anyway, so that's not completely wasted.

Tested-by: Jeremy Linton <jeremy.linton@arm.com>
Tested-by: Bhupesh Sharma <bhsharma@redhat.com>
Tested-by: Lei Zhang <zhang.lei@jp.fujitsu.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

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This commit is contained in:

Marc Zyngier 2018-07-27 13:38:54 +01:00

parent 053be4854f

commit 11e37d357f

2 changed files with 53 additions and 28 deletions

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82

drivers/irqchip/irq-gic-v3-its.c

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1

include/linux/irqchip/arm-gic-v3.h

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