namespaces: mqueue ns: move mqueue_mnt into struct ipc_namespace

Move mqueue vfsmount plus a few tunables into the ipc_namespace struct.
The CONFIG_IPC_NS boolean and the ipc_namespace struct will serve both the
posix message queue namespaces and the SYSV ipc namespaces.

The sysctl code will be fixed separately in patch 3.  After just this
patch, making a change to posix mqueue tunables always changes the values
in the initial ipc namespace.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/init/Kconfig b/init/Kconfig
index c52d1d48272a..a0807ba91644 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -670,10 +670,10 @@ config UTS_NS
 
 config IPC_NS
         bool "IPC namespace"
-        depends on NAMESPACES && SYSVIPC
+        depends on NAMESPACES && (SYSVIPC || POSIX_MQUEUE)
         help
           In this namespace tasks work with IPC ids which correspond to
-          different IPC objects in different namespaces
+          different IPC objects in different namespaces.
 
 config USER_NS
         bool "User namespace (EXPERIMENTAL)"