Merge branch 'linus'

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/i386/kernel/topology.c b/arch/i386/kernel/topology.c
index 67a0e1baa28b..296355292c7c 100644
--- a/arch/i386/kernel/topology.c
+++ b/arch/i386/kernel/topology.c
@@ -41,6 +41,15 @@ int arch_register_cpu(int num){
                 parent = &node_devices[node].node;
 #endif /* CONFIG_NUMA */
 
+        /*
+         * CPU0 cannot be offlined due to several
+         * restrictions and assumptions in kernel. This basically
+         * doesnt add a control file, one cannot attempt to offline
+         * BSP.
+         */
+        if (!num)
+                cpu_devices[num].cpu.no_control = 1;
+
         return register_cpu(&cpu_devices[num].cpu, num, parent);
 }