From: Parav Pandit <parav@mellanox.com>
Date: Tue, 21 Jul 2020 19:53:53 +0300
Subject: devlink: Add comment for devlink instance lock
Patch-mainline: v5.9-rc1
Git-commit: 336ce1c93293e1e606fbc557587b1a1f8630cd5c
References: bsc#1176447

Add comment to describe the purpose of devlink instance lock.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 include/net/devlink.h |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -40,7 +40,9 @@ struct devlink {
 	struct xarray snapshot_ids;
 	struct device *dev;
 	possible_net_t _net;
-	struct mutex lock;
+	struct mutex lock; /* Serializes access to devlink instance specific objects such as
+			    * port, sb, dpipe, resource, params, region, traps and more.
+			    */
 	u8 reload_failed:1,
 	   reload_enabled:1,
 	   registered:1;