From: Byungchul Park <byungchul.p...@lge.com>
This reverts commit 601c942176d8ad8334118bddb747e3720bed24f8.
This patch is designed to ensure that the cpu being offlined is not
present in the affinity mask. But it is a bad idea to overwrite the
affinity variable with cpu_online_mask, even in case that the current
affinity already includes onlined cpus.
So revert this patch to replace it with another one doing exactly
what it intends.
Signed-off-by: Byungchul Park <byungchul.p...@lge.com>
---
arch/arm64/kernel/irq.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c
index 0f08dfd..473e5db 100644
--- a/arch/arm64/kernel/irq.c
+++ b/arch/arm64/kernel/irq.c
@@ -97,15 +97,11 @@ static bool migrate_one_irq(struct irq_desc *desc)
if (irqd_is_per_cpu(d) || !cpumask_test_cpu(smp_processor_id(),
affinity))
return false;
- if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids)
+ if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids) {
+ affinity = cpu_online_mask;
ret = true;
+ }
- /*
- * when using forced irq_set_affinity we must ensure that the cpu
- * being offlined is not present in the affinity mask, it may be
- * selected as the target CPU otherwise
- */
- affinity = cpu_online_mask;
c = irq_data_get_irq_chip(d);
if (!c->irq_set_affinity)
pr_debug("IRQ%u: unable to set affinity\n", d->irq);
--
1.7.9.5
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