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-rw-r--r--arch/x86_64/kernel/genapic.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/genapic.c b/arch/x86_64/kernel/genapic.c
index fe416fd4dbe..7a64ea18178 100644
--- a/arch/x86_64/kernel/genapic.c
+++ b/arch/x86_64/kernel/genapic.c
@@ -104,9 +104,14 @@ void __init clustered_apic_check(void)
* (We don't use lowest priority delivery + HW APIC IRQ steering, so
* can ignore the clustered logical case and go straight to physical.)
*/
- if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster)
+ if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster) {
+#ifdef CONFIG_HOTPLUG_CPU
+ /* Don't use APIC shortcuts in CPU hotplug to avoid races */
+ genapic = &apic_physflat;
+#else
genapic = &apic_flat;
- else
+#endif
+ } else
genapic = &apic_cluster;
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