From: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> Sent: Sunday, April 5, 2020 5:15 PM > > init_vp_index() may access the cpu_online_mask mask via its calls of > cpumask_of_node(). Make sure to protect these accesses with a > cpus_read_lock() critical section. > > Also, remove some (hardcoded) instances of CPU(0) from init_vp_index() > and replace them with VMBUS_CONNECT_CPU. The connect CPU can not go > offline, since Hyper-V does not provide a way to change it. > > Finally, order the accesses of target_cpu from init_vp_index() and > hv_synic_cleanup() by relying on the channel_mutex; this is achieved > by moving the call of init_vp_index() into vmbus_process_offer(). > > Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> > --- > drivers/hv/channel_mgmt.c | 47 ++++++++++++++++++++++++++++----------- > drivers/hv/hv.c | 7 +++--- > 2 files changed, 38 insertions(+), 16 deletions(-) > Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
