ns: add to_<type>_ns() to respective headers

Every namespace type has a container_of(ns, <ns_type>, ns) static inline
function that is currently not exposed in the header. So we have a bunch
of places that open-code it via container_of(). Move it to the headers
so we can use it directly.

Reviewed-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

1 files changed, 0 insertions, 5 deletions

diff --git a/kernel/utsname.c b/kernel/utsname.c
index 64155417ae0c..a682830742d3 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -103,11 +103,6 @@ void free_uts_ns(struct uts_namespace *ns)
 	kfree_rcu(ns, ns.ns_rcu);
 }
 
-static inline struct uts_namespace *to_uts_ns(struct ns_common *ns)
-{
-	return container_of(ns, struct uts_namespace, ns);
-}
-
 static struct ns_common *utsns_get(struct task_struct *task)
 {
 	struct uts_namespace *ns = NULL;