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-rw-r--r--include/linux/ipc_namespace.h1
-rw-r--r--ipc/namespace.c48
2 files changed, 24 insertions, 25 deletions
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index 3bf40e246a80..804e4e4a2b62 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -94,7 +94,6 @@ static inline int mq_init_ns(struct ipc_namespace *ns) { return 0; }
94#endif 94#endif
95 95
96#if defined(CONFIG_IPC_NS) 96#if defined(CONFIG_IPC_NS)
97extern void free_ipc_ns(struct ipc_namespace *ns);
98extern struct ipc_namespace *copy_ipcs(unsigned long flags, 97extern struct ipc_namespace *copy_ipcs(unsigned long flags,
99 struct ipc_namespace *ns); 98 struct ipc_namespace *ns);
100extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, 99extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,
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,
83 up_write(&ids->rw_mutex); 83 up_write(&ids->rw_mutex);
84} 84}
85 85
86static void free_ipc_ns(struct ipc_namespace *ns)
87{
88 /*
89 * Unregistering the hotplug notifier at the beginning guarantees
90 * that the ipc namespace won't be freed while we are inside the
91 * callback routine. Since the blocking_notifier_chain_XXX routines
92 * hold a rw lock on the notifier list, unregister_ipcns_notifier()
93 * won't take the rw lock before blocking_notifier_call_chain() has
94 * released the rd lock.
95 */
96 unregister_ipcns_notifier(ns);
97 sem_exit_ns(ns);
98 msg_exit_ns(ns);
99 shm_exit_ns(ns);
100 kfree(ns);
101 atomic_dec(&nr_ipc_ns);
102
103 /*
104 * Do the ipcns removal notification after decrementing nr_ipc_ns in
105 * order to have a correct value when recomputing msgmni.
106 */
107 ipcns_notify(IPCNS_REMOVED);
108}
109
86/* 110/*
87 * put_ipc_ns - drop a reference to an ipc namespace. 111 * put_ipc_ns - drop a reference to an ipc namespace.
88 * @ns: the namespace to put 112 * @ns: the namespace to put
@@ -108,27 +132,3 @@ void put_ipc_ns(struct ipc_namespace *ns)
108 free_ipc_ns(ns); 132 free_ipc_ns(ns);
109 } 133 }
110} 134}
111
112void free_ipc_ns(struct ipc_namespace *ns)
113{
114 /*
115 * Unregistering the hotplug notifier at the beginning guarantees
116 * that the ipc namespace won't be freed while we are inside the
117 * callback routine. Since the blocking_notifier_chain_XXX routines
118 * hold a rw lock on the notifier list, unregister_ipcns_notifier()
119 * won't take the rw lock before blocking_notifier_call_chain() has
120 * released the rd lock.
121 */
122 unregister_ipcns_notifier(ns);
123 sem_exit_ns(ns);
124 msg_exit_ns(ns);
125 shm_exit_ns(ns);
126 kfree(ns);
127 atomic_dec(&nr_ipc_ns);
128
129 /*
130 * Do the ipcns removal notification after decrementing nr_ipc_ns in
131 * order to have a correct value when recomputing msgmni.
132 */
133 ipcns_notify(IPCNS_REMOVED);
134}