make proc_ns_operations work with struct ns_common * instead of void *

We can do that now.  And kill ->inum(), while we are at it - all instances
are identical.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 9 deletions

diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 1ab2209228ff..29cd5ccfc37a 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -846,7 +846,7 @@ static inline struct user_namespace *to_user_ns(struct ns_common *ns)
         return container_of(ns, struct user_namespace, ns);
 }
 
-static void *userns_get(struct task_struct *task)
+static struct ns_common *userns_get(struct task_struct *task)
 {
         struct user_namespace *user_ns;
 
@@ -857,12 +857,12 @@ static void *userns_get(struct task_struct *task)
         return user_ns ? &user_ns->ns : NULL;
 }
 
-static void userns_put(void *ns)
+static void userns_put(struct ns_common *ns)
 {
         put_user_ns(to_user_ns(ns));
 }
 
-static int userns_install(struct nsproxy *nsproxy, void *ns)
+static int userns_install(struct nsproxy *nsproxy, struct ns_common *ns)
 {
         struct user_namespace *user_ns = to_user_ns(ns);
         struct cred *cred;
@@ -893,18 +893,12 @@ static int userns_install(struct nsproxy *nsproxy, void *ns)
         return commit_creds(cred);
 }
 
-static unsigned int userns_inum(void *ns)
-{
-        return ((struct ns_common *)ns)->inum;
-}
-
 const struct proc_ns_operations userns_operations = {
         .name           = "user",
         .type           = CLONE_NEWUSER,
         .get            = userns_get,
         .put            = userns_put,
         .install        = userns_install,
-        .inum           = userns_inum,
 };
 
 static __init int user_namespaces_init(void)