ipc: delete "nr_ipc_ns"

Write-only variable.

Link: http://lkml.kernel.org/r/20160708214356.GA6785@p183.telecom.by
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 0 insertions, 6 deletions

diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index 1eee6bcfcf76..d10e54f03c09 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -63,8 +63,6 @@ struct ipc_namespace {
 };
 
 extern struct ipc_namespace init_ipc_ns;
-extern atomic_t nr_ipc_ns;
-
 extern spinlock_t mq_lock;
 
 #ifdef CONFIG_SYSVIPC
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index ed81aafd2392..a521999de4f1 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -37,8 +37,6 @@ struct ipc_namespace init_ipc_ns = {
 #endif
 };
 
-atomic_t nr_ipc_ns = ATOMIC_INIT(1);
-
 struct msg_msgseg {
         struct msg_msgseg *next;
         /* the next part of the message follows immediately */
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 04cb07eb81f1..d87e6baa1323 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -43,7 +43,6 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
                 kfree(ns);
                 return ERR_PTR(err);
         }
-        atomic_inc(&nr_ipc_ns);
 
         sem_init_ns(ns);
         msg_init_ns(ns);
@@ -96,7 +95,6 @@ static void free_ipc_ns(struct ipc_namespace *ns)
         sem_exit_ns(ns);
         msg_exit_ns(ns);
         shm_exit_ns(ns);
-        atomic_dec(&nr_ipc_ns);
 
         put_user_ns(ns->user_ns);
         ns_free_inum(&ns->ns);