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Dexuan Cui 1d24e26090 Drivers: hv: vmbus: Use get/put_cpu() in vmbus_connect() 
commit 41e270f689 upstream.

With CONFIG_DEBUG_PREEMPT=y, I always see this warning:
BUG: using smp_processor_id() in preemptible [00000000]

Fix the false warning by using get/put_cpu().

Here vmbus_connect() sends a message to the host and waits for the
host's response. The host will deliver the response message and an
interrupt on CPU msg->target_vcpu, and later the interrupt handler
will wake up vmbus_connect(). vmbus_connect() doesn't really have
to run on the same cpu as CPU msg->target_vcpu, so it's safe to
call put_cpu() just here.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Cc: stable@vger.kernel.org
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2018-10-10 08:54:28 +02:00
..
Kconfig x86/hyper-v: Use hypercall for remote TLB flush 2017-08-10 20:16:44 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
channel.c Drivers: hv: vmbus: Reset the channel callback in vmbus_onoffer_rescind() 2018-09-09 19:55:56 +02:00
channel_mgmt.c Drivers: hv: vmbus: Reset the channel callback in vmbus_onoffer_rescind() 2018-09-09 19:55:56 +02:00
connection.c Drivers: hv: vmbus: Use get/put_cpu() in vmbus_connect() 2018-10-10 08:54:28 +02:00
hv.c Drivers: hv: vmbus: Cleanup synic memory free path 2018-09-19 22:43:40 +02:00
hv_balloon.c Drivers: hv: balloon: Initialize last_post_time on startup 2017-08-16 09:14:43 -07:00
hv_fcopy.c Drivers: hv: fcopy: restore correct transfer length 2017-09-22 10:29:54 +02:00
hv_kvp.c Drivers: hv: kvp: Use MAX_ADAPTER_ID_SIZE for translating adapter id 2017-08-16 09:14:43 -07:00
hv_snapshot.c Merge 4.11-rc4 into char-misc-next 2017-03-27 09:13:04 +02:00
hv_util.c hv_utils: fix TimeSync work on pre-TimeSync-v4 hosts 2017-05-25 15:42:42 +02:00
hv_utils_transport.c Drivers: hv: util: move waiting for release to hv_utils_transport itself 2017-03-16 16:42:00 +09:00
hv_utils_transport.h Drivers: hv: util: move waiting for release to hv_utils_transport itself 2017-03-16 16:42:00 +09:00
hyperv_vmbus.h hyper-v: Globalize vp_index 2017-08-10 16:50:23 +02:00
ring_buffer.c Drivers: hv: vmbus: Fix ring buffer signaling 2018-03-28 18:24:34 +02:00
vmbus_drv.c x86/virt: Add enum for hypervisors to replace x86_hyper 2017-12-25 14:26:20 +01:00