4 files changed, 21 insertions, 24 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 47879a874966..2a6499d6f283 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -214,15 +214,6 @@ config TASK_IO_ACCOUNTING
 
           Say N if unsure.
 
-config USER_NS
-        bool "User Namespaces (EXPERIMENTAL)"
-        default n
-        depends on EXPERIMENTAL
-        help
-          Support user namespaces.  This allows containers, i.e.
-          vservers, to use user namespaces to provide different
-          user info for different servers.  If unsure, say N.
-
 config PID_NS
         bool "PID Namespaces (EXPERIMENTAL)"
         default n
@@ -443,6 +434,14 @@ config IPC_NS
           In this namespace tasks work with IPC ids which correspond to
           different IPC objects in different namespaces
 
+config USER_NS
+        bool "User namespace (EXPERIMENTAL)"
+        depends on NAMESPACES && EXPERIMENTAL
+        help
+          This allows containers, i.e. vservers, to use user namespaces
+          to provide different user info for different servers.
+          If unsure, say N.
+
 config BLK_DEV_INITRD
         bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
         depends on BROKEN || !FRV
diff --git a/kernel/Makefile b/kernel/Makefile
index 0f15bd409367..30a957a35c91 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -4,7 +4,7 @@
 
 obj-y     = sched.o fork.o exec_domain.o panic.o printk.o profile.o \
             exit.o itimer.o time.o softirq.o resource.o \
-            sysctl.o capability.o ptrace.o timer.o user.o user_namespace.o \
+            sysctl.o capability.o ptrace.o timer.o user.o \
             signal.o sys.o kmod.o workqueue.o pid.o \
             rcupdate.o extable.o params.o posix-timers.o \
             kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
@@ -33,7 +33,6 @@ obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
 obj-$(CONFIG_UID16) += uid16.o
 obj-$(CONFIG_MODULES) += module.o
 obj-$(CONFIG_KALLSYMS) += kallsyms.o
-obj-$(CONFIG_UTS_NS) += utsname.o
 obj-$(CONFIG_PM) += power/
 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
 obj-$(CONFIG_KEXEC) += kexec.o
@@ -43,6 +42,8 @@ obj-$(CONFIG_CGROUPS) += cgroup.o
 obj-$(CONFIG_CGROUP_DEBUG) += cgroup_debug.o
 obj-$(CONFIG_CPUSETS) += cpuset.o
 obj-$(CONFIG_CGROUP_NS) += ns_cgroup.o
+obj-$(CONFIG_UTS_NS) += utsname.o
+obj-$(CONFIG_USER_NS) += user_namespace.o
 obj-$(CONFIG_IKCONFIG) += configs.o
 obj-$(CONFIG_RESOURCE_COUNTERS) += res_counter.o
 obj-$(CONFIG_STOP_MACHINE) += stop_machine.o
diff --git a/kernel/user.c b/kernel/user.c
index bc1c48d35cb3..7d7900c5a1fd 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -17,6 +17,14 @@
 #include <linux/module.h>
 #include <linux/user_namespace.h>
 
+struct user_namespace init_user_ns = {
+        .kref = {
+                .refcount       = ATOMIC_INIT(2),
+        },
+        .root_user = &root_user,
+};
+EXPORT_SYMBOL_GPL(init_user_ns);
+
 /*
  * UID task count cache, to get fast user lookup in "alloc_uid"
  * when changing user ID's (ie setuid() and friends).
@@ -427,6 +435,7 @@ void switch_uid(struct user_struct *new_user)
         suid_keys(current);
 }
 
+#ifdef CONFIG_USER_NS
 void release_uids(struct user_namespace *ns)
 {
         int i;
@@ -451,6 +460,7 @@ void release_uids(struct user_namespace *ns)
 
         free_uid(ns->root_user);
 }
+#endif
 
 static int __init uid_cache_init(void)
 {
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 7af90fc4f0fd..4c9006275df7 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -10,17 +10,6 @@
 #include <linux/nsproxy.h>
 #include <linux/user_namespace.h>
 
-struct user_namespace init_user_ns = {
-        .kref = {
-                .refcount       = ATOMIC_INIT(2),
-        },
-        .root_user = &root_user,
-};
-
-EXPORT_SYMBOL_GPL(init_user_ns);
-
-#ifdef CONFIG_USER_NS
-
 /*
  * Clone a new ns copying an original user ns, setting refcount to 1
  * @old_ns: namespace to clone
@@ -84,5 +73,3 @@ void free_user_ns(struct kref *kref)
         release_uids(ns);
         kfree(ns);
 }
-
-#endif /* CONFIG_USER_NS */