userns: Add per user namespace sysctls.

Limit per userns sysctls to only be opened for write by a holder
of CAP_SYS_RESOURCE.

Add all of the necessary boilerplate for having per user namespace
sysctls.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/Makefile b/kernel/Makefile
index e2ec54e2b952..eb26e12c6c2a 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -9,7 +9,7 @@ obj-y     = fork.o exec_domain.o panic.o \
             extable.o params.o \
             kthread.o sys_ni.o nsproxy.o \
             notifier.o ksysfs.o cred.o reboot.o \
-            async.o range.o smpboot.o
+            async.o range.o smpboot.o ucount.o
 
 obj-$(CONFIG_MULTIUSER) += groups.o