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>

3 files changed, 9 insertions, 27 deletions

diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index dd961ad86fbd..79aabce49a85 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -318,7 +318,7 @@ static inline struct pid_namespace *to_pid_ns(struct ns_common *ns)
         return container_of(ns, struct pid_namespace, ns);
 }
 
-static void *pidns_get(struct task_struct *task)
+static struct ns_common *pidns_get(struct task_struct *task)
 {
         struct pid_namespace *ns;
 
@@ -331,12 +331,12 @@ static void *pidns_get(struct task_struct *task)
         return ns ? &ns->ns : NULL;
 }
 
-static void pidns_put(void *ns)
+static void pidns_put(struct ns_common *ns)
 {
         put_pid_ns(to_pid_ns(ns));
 }
 
-static int pidns_install(struct nsproxy *nsproxy, void *ns)
+static int pidns_install(struct nsproxy *nsproxy, struct ns_common *ns)
 {
         struct pid_namespace *active = task_active_pid_ns(current);
         struct pid_namespace *ancestor, *new = to_pid_ns(ns);
@@ -367,18 +367,12 @@ static int pidns_install(struct nsproxy *nsproxy, void *ns)
         return 0;
 }
 
-static unsigned int pidns_inum(void *ns)
-{
-        return ((struct ns_common *)ns)->inum;
-}
-
 const struct proc_ns_operations pidns_operations = {
         .name           = "pid",
         .type           = CLONE_NEWPID,
         .get            = pidns_get,
         .put            = pidns_put,
         .install        = pidns_install,
-        .inum           = pidns_inum,
 };
 
 static __init int pid_namespaces_init(void)
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)
diff --git a/kernel/utsname.c b/kernel/utsname.c
index 1917f74be8ec..20697befe466 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -93,7 +93,7 @@ static inline struct uts_namespace *to_uts_ns(struct ns_common *ns)
         return container_of(ns, struct uts_namespace, ns);
 }
 
-static void *utsns_get(struct task_struct *task)
+static struct ns_common *utsns_get(struct task_struct *task)
 {
         struct uts_namespace *ns = NULL;
         struct nsproxy *nsproxy;
@@ -109,12 +109,12 @@ static void *utsns_get(struct task_struct *task)
         return ns ? &ns->ns : NULL;
 }
 
-static void utsns_put(void *ns)
+static void utsns_put(struct ns_common *ns)
 {
         put_uts_ns(to_uts_ns(ns));
 }
 
-static int utsns_install(struct nsproxy *nsproxy, void *new)
+static int utsns_install(struct nsproxy *nsproxy, struct ns_common *new)
 {
         struct uts_namespace *ns = to_uts_ns(new);
 
@@ -128,16 +128,10 @@ static int utsns_install(struct nsproxy *nsproxy, void *new)
         return 0;
 }
 
-static unsigned int utsns_inum(void *vp)
-{
-        return ((struct ns_common *)vp)->inum;
-}
-
 const struct proc_ns_operations utsns_operations = {
         .name           = "uts",
         .type           = CLONE_NEWUTS,
         .get            = utsns_get,
         .put            = utsns_put,
         .install        = utsns_install,
-        .inum           = utsns_inum,
 };