diff options
Diffstat (limited to 'ipc/namespace.c')
| -rw-r--r-- | ipc/namespace.c | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c index 231ee5359abf..a1094ff0befa 100644 --- a/ipc/namespace.c +++ b/ipc/namespace.c @@ -83,6 +83,30 @@ void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, up_write(&ids->rw_mutex); } +static void free_ipc_ns(struct ipc_namespace *ns) +{ + /* + * Unregistering the hotplug notifier at the beginning guarantees + * that the ipc namespace won't be freed while we are inside the + * callback routine. Since the blocking_notifier_chain_XXX routines + * hold a rw lock on the notifier list, unregister_ipcns_notifier() + * won't take the rw lock before blocking_notifier_call_chain() has + * released the rd lock. + */ + unregister_ipcns_notifier(ns); + sem_exit_ns(ns); + msg_exit_ns(ns); + shm_exit_ns(ns); + kfree(ns); + atomic_dec(&nr_ipc_ns); + + /* + * Do the ipcns removal notification after decrementing nr_ipc_ns in + * order to have a correct value when recomputing msgmni. + */ + ipcns_notify(IPCNS_REMOVED); +} + /* * put_ipc_ns - drop a reference to an ipc namespace. * @ns: the namespace to put @@ -108,27 +132,3 @@ void put_ipc_ns(struct ipc_namespace *ns) free_ipc_ns(ns); } } - -void free_ipc_ns(struct ipc_namespace *ns) -{ - /* - * Unregistering the hotplug notifier at the beginning guarantees - * that the ipc namespace won't be freed while we are inside the - * callback routine. Since the blocking_notifier_chain_XXX routines - * hold a rw lock on the notifier list, unregister_ipcns_notifier() - * won't take the rw lock before blocking_notifier_call_chain() has - * released the rd lock. - */ - unregister_ipcns_notifier(ns); - sem_exit_ns(ns); - msg_exit_ns(ns); - shm_exit_ns(ns); - kfree(ns); - atomic_dec(&nr_ipc_ns); - - /* - * Do the ipcns removal notification after decrementing nr_ipc_ns in - * order to have a correct value when recomputing msgmni. - */ - ipcns_notify(IPCNS_REMOVED); -} |