[PATCH 08/11] staging: vchiq_core: Add comments to mutex/spinlocks

[Stefan Wahren]

From: Phil Elwell <phil at raspberrypi.com>

checkpatch.pl complains about missing comments at
mutex/spinlock definitions. So add them accordingly.

Link: https://github.com/raspberrypi/linux/pull/6139/
Signed-off-by: Phil Elwell <phil at raspberrypi.com>
Signed-off-by: Stefan Wahren <wahrenst at gmx.net>
---
 .../vc04_services/interface/vchiq_arm/vchiq_core.h     | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
index 3c7a6838ddba..3abcd6910f25 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
@@ -196,6 +196,8 @@ struct vchiq_service {

 	struct completion remove_event;
 	struct completion bulk_remove_event;
+
+	/* Serialise access to the bulk transfer queues */
 	struct mutex bulk_mutex;

 	struct service_stats_struct {
@@ -312,7 +314,7 @@ struct vchiq_state {
 	/* Event indicating connect message received */
 	struct completion connect;

-	/* Mutex protecting services */
+	/* Mutex protecting service creation */
 	struct mutex mutex;
 	struct vchiq_instance **instance;

@@ -341,16 +343,22 @@ struct vchiq_state {
 	char *rx_data;
 	struct vchiq_slot_info *rx_info;

+	/* Serialise access to the main message slots */
 	struct mutex slot_mutex;

+	/* Serialise slot refcount updates */
 	struct mutex recycle_mutex;

+	/* Serialise access to the single synchronous message slot */
 	struct mutex sync_mutex;

+	/* Serialise access to the message queues to userspace */
 	spinlock_t msg_queue_spinlock;

+	/* Serialise completion of blocking transfers */
 	spinlock_t bulk_waiter_spinlock;

+	/* Serialise updates to slot quota data */
 	spinlock_t quota_spinlock;

 	/*
--
2.34.1