Messages in this thread Patch in this message | | | From | Marc Zyngier <> | Subject | [PATCH 2/2] arm64: Mark the recheduling IPI as naked interrupt | Date | Sun, 1 Nov 2020 13:14:30 +0000 |
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Flag the rescheduling IPI as 'naked', making sure such interrupt doesn't trigger a rescheduling event by itself.
Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kernel/smp.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 82e75fc2c903..6c11be3e74d3 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -993,6 +993,10 @@ void __init set_smp_ipi_range(int ipi_base, int n) ipi_desc[i] = irq_to_desc(ipi_base + i); irq_set_status_flags(ipi_base + i, IRQ_HIDDEN); + + /* The recheduling IPI is special... */ + if (i == IPI_RESCHEDULE) + irq_set_status_flags(ipi_base + i, IRQ_NAKED); } ipi_irq_base = ipi_base; -- 2.28.0
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