Commit 437ebfd9 authored by Leon Romanovsky's avatar Leon Romanovsky Committed by David S. Miller

devlink: Count struct devlink consumers

The struct devlink itself is protected by internal lock and doesn't
need global lock during operation. That global lock is used to protect
addition/removal new devlink instances from the global list in use by
all devlink consumers in the system.

The future conversion of linked list to be xarray will allow us to
actually delete that lock, but first we need to count all struct devlink
users.

The reference counting provides us a way to ensure that no new user
space commands success to grab devlink instance which is going to be
destroyed makes it is safe to access it without lock.
Signed-off-by: default avatarLeon Romanovsky <leonro@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7ca973dc
......@@ -56,6 +56,8 @@ struct devlink {
*/
u8 reload_failed:1,
reload_enabled:1;
refcount_t refcount;
struct completion comp;
char priv[0] __aligned(NETDEV_ALIGN);
};
......
This diff is collapsed.
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment