KVM: arm64: vgic: Don't acquire the lpi_list_lock in vgic_put_irq()

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The LPI xarray's xa_lock is sufficient for synchronizing writers when
freeing a given LPI. Furthermore, readers can only take a new reference
on an IRQ if it was already nonzero.

Stop taking the lpi_list_lock unnecessarily and get rid of
__vgic_put_lpi_locked().

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240221054253.3848076-11-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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This commit is contained in:

Oliver Upton 2024-02-21 05:42:53 +00:00

parent 50ac89bb70

commit e27f2d561f

3 changed files with 11 additions and 22 deletions

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arch/arm64/kvm/vgic/vgic-its.c

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arch/arm64/kvm/vgic/vgic.c

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arch/arm64/kvm/vgic/vgic.h

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