[PATCH 29/30] ACPI idle, CPU hotplug: Fix NULL pointer dereference during hotplug

2012-10-09 Thread Len Brown
From: "Srivatsa S. Bhat" On a KVM guest, when a CPU is taken offline and brought back online, we hit the following NULL pointer dereference: [ 45.400843] Unregister pv shared memory for cpu 1 [ 45.412331] smpboot: CPU 1 is now offline [ 45.529894] SMP alternatives: lockdep: fixing up

[PATCH 29/30] ACPI idle, CPU hotplug: Fix NULL pointer dereference during hotplug

2012-10-09 Thread Len Brown
From: Srivatsa S. Bhat srivatsa.b...@linux.vnet.ibm.com On a KVM guest, when a CPU is taken offline and brought back online, we hit the following NULL pointer dereference: [ 45.400843] Unregister pv shared memory for cpu 1 [ 45.412331] smpboot: CPU 1 is now offline [ 45.529894] SMP