userns: Use cred->user_ns instead of cred->user->user_ns
Optimize performance and prepare for the removal of the user_ns reference
from user_struct. Remove the slow long walk through cred->user->user_ns and
instead go straight to cred->user_ns.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
diff --git a/ipc/namespace.c b/ipc/namespace.c
index ce0a647..f362298c 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -46,7 +46,7 @@
ipcns_notify(IPCNS_CREATED);
register_ipcns_notifier(ns);
- ns->user_ns = get_user_ns(task_cred_xxx(tsk, user)->user_ns);
+ ns->user_ns = get_user_ns(task_cred_xxx(tsk, user_ns));
return ns;
}