From 7b5aa8c809247366a032e9f61cf6b8d1e5c8dff1 Mon Sep 17 00:00:00 2001
From: Andi Kleen <ak@suse.de>
Date: Mon, 12 Sep 2005 18:49:24 +0200
Subject: [PATCH] --- yaml --- r: 8621 b: refs/heads/master c:
 5bf97e01192f0fcdff2f0e9eae063e7785f6f915 h: refs/heads/master i:   8619:
 9e70fe994a85e3520737991dc87736cf9d7a4a48 v: v3

---
 [refs]                             | 2 +-
 trunk/arch/x86_64/kernel/genapic.c | 9 +++++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 5e42ada177f2..825c77321531 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 27183ebd330a676fe29f7eb9b7ff582492246ec8
+refs/heads/master: 5bf97e01192f0fcdff2f0e9eae063e7785f6f915
diff --git a/trunk/arch/x86_64/kernel/genapic.c b/trunk/arch/x86_64/kernel/genapic.c
index fe416fd4dbe0..7a64ea181788 100644
--- a/trunk/arch/x86_64/kernel/genapic.c
+++ b/trunk/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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