From: K. Y. Srinivasan Date: Mon, 15 Dec 2014 07:34:51 +0000 (-0800) Subject: Drivers: hv: vmbus: Use get_cpu() to get the current CPU X-Git-Tag: v5.15~16326^2~87 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=87712bf81dd092821c406ea3fb47a07222484a64;p=platform%2Fkernel%2Flinux-starfive.git Drivers: hv: vmbus: Use get_cpu() to get the current CPU Replace calls for smp_processor_id() to get_cpu() to get the CPU ID of the current CPU. In these instances, there is no correctness issue with regards to preemption, we just need the current CPU ID. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 2c59f03..1d7df25 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -815,7 +815,7 @@ cleanup: struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary) { struct list_head *cur, *tmp; - int cur_cpu = hv_context.vp_index[smp_processor_id()]; + int cur_cpu; struct vmbus_channel *cur_channel; struct vmbus_channel *outgoing_channel = primary; int cpu_distance, new_cpu_distance; @@ -823,6 +823,8 @@ struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary) if (list_empty(&primary->sc_list)) return outgoing_channel; + cur_cpu = hv_context.vp_index[get_cpu()]; + put_cpu(); list_for_each_safe(cur, tmp, &primary->sc_list) { cur_channel = list_entry(cur, struct vmbus_channel, sc_list); if (cur_channel->state != CHANNEL_OPENED_STATE) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index e206619..a63a795 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -80,8 +80,10 @@ static int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, msg->interrupt_page = virt_to_phys(vmbus_connection.int_page); msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages[0]); msg->monitor_page2 = virt_to_phys(vmbus_connection.monitor_pages[1]); - if (version == VERSION_WIN8_1) - msg->target_vcpu = hv_context.vp_index[smp_processor_id()]; + if (version == VERSION_WIN8_1) { + msg->target_vcpu = hv_context.vp_index[get_cpu()]; + put_cpu(); + } /* * Add to list before we send the request since we may