This patch addresses problems when hotplugging cpus while
profiling. Instead of allocating only online cpus, all possible cpu
buffers are allocated, which allows cpus to be onlined during
operation. If a cpu is offlined before profiling is shutdown
wq_sync_buffer checks for this condition then cancels this work and
does not sync this buffer.
Signed-off-by: NChris J Arges <arges@linux.vnet.ibm.com>
Signed-off-by: NRobert Richter <robert.richter@amd.com>