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-rw-r--r--arch/x86/kernel/irq.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index dbb60878b74..d99f31d9a75 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -266,6 +266,14 @@ __visible void smp_trace_x86_platform_ipi(struct pt_regs *regs)
EXPORT_SYMBOL_GPL(vector_used_by_percpu_irq);
#ifdef CONFIG_HOTPLUG_CPU
+
+/* These two declarations are only used in check_irq_vectors_for_cpu_disable()
+ * below, which is protected by stop_machine(). Putting them on the stack
+ * results in a stack frame overflow. Dynamically allocating could result in a
+ * failure so declare these two cpumasks as global.
+ */
+static struct cpumask affinity_new, online_new;
+
/*
* This cpu is going to be removed and its vectors migrated to the remaining
* online cpus. Check to see if there are enough vectors in the remaining cpus.
@@ -277,7 +285,6 @@ int check_irq_vectors_for_cpu_disable(void)
unsigned int this_cpu, vector, this_count, count;
struct irq_desc *desc;
struct irq_data *data;
- struct cpumask affinity_new, online_new;
this_cpu = smp_processor_id();
cpumask_copy(&online_new, cpu_online_mask);