[Cluster-devel] [PATCHv3 dlm/next 02/20] fs: dlm: set subclass for othercon sock_mutex

[Alexander Aring]

This patch sets the lockdep subclass for the othercon socket mutex. In
various places the connection socket mutex is held while locking the
othercon socket mutex. This patch will remove lockdep warnings when such
case occurs.

Signed-off-by: Alexander Aring <aahringo at redhat.com>
---
 fs/dlm/lowcomms.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 2fd1e4c13663..d772e1d4461d 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -911,13 +911,14 @@ static int accept_from_sock(struct listen_connection *con)
 				goto accept_err;
 			}
 
+			lockdep_set_subclass(&othercon->sock_mutex, 1);
 			newcon->othercon = othercon;
 		} else {
 			/* close other sock con if we have something new */
 			close_connection(othercon, false, true, false);
 		}
 
-		mutex_lock_nested(&othercon->sock_mutex, 1);
+		mutex_lock(&othercon->sock_mutex);
 		add_sock(newsock, othercon);
 		addcon = othercon;
 		mutex_unlock(&othercon->sock_mutex);
-- 
2.26.2